---
title: rotor — school dictionary · trees and pragmatics
description: «rotor» in the school dictionary: A rotor is a part of a machine that turns round and round, such as the blades on top of a helicopter. Every meaning for a pupil with its dependency tree and pragmatics.
---

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# rotor

<!-- .vintro -->
**Who acts:** rotor, machine, wind, tail rotor, helicopter, We · **What happens:** be, turn, spin, begin, stop, turn round · **To what, where:** part, spinning part, electric motor, hub, wind turbine, helicopter

<!-- .vabout -->
«rotor» in the school dictionary: its 3 meanings for a pupil and its 6 examples, every sentence parsed by Mova itself — its syntax tree, a dependency tree in the style of Universal Dependencies, and its pragmatics clause by clause. The word in the dictionary, with its sense in the lessons: [rotor in the school dictionary](https://md.mova.elamur.ai/free/en/dictionaries/school/w/rotor.md).

## Meaning 1 {#m1}

<!-- .ven lang=en -->
A rotor is a part of a machine that turns round and round, such as the blades on top of a helicopter.

<!-- fold The tree, 22 words -->
```conllu
# sent_id = dict:school:rotor:m1:1
# text = A rotor is a part of a machine that turns round and round, such as the blades on top of a helicopter.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	rotor	rotor	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	part	part	NOUN	NN	Number=Sing	0	root	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	machine	machine	NOUN	NN	Number=Sing	5	nmod	_	_
9	that	that	PRON	WDT	PronType=Rel	10	nsubj	_	_
10	turns	turn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	acl:relcl	_	_
11	round	round	ADV	RB	_	10	advmod	_	_
12	and	and	CCONJ	CC	_	13	cc	_	_
13	round	round	ADV	RB	_	11	conj	_	SpaceAfter=No
14	,	,	PUNCT	,	_	18	punct	_	_
15	such	such	ADJ	JJ	Degree=Pos|ExtPos=ADP	18	case	_	_
16	as	as	ADP	IN	_	15	fixed	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	18	det	_	_
18	blades	blade	NOUN	NNS	Number=Plur	5	appos	_	_
19	on	on	ADP	IN	_	20	case	_	_
20	top	top	NOUN	NN	Number=Sing	18	nmod	_	_
21	of	of	ADP	IN	_	23	case	_	_
22	a	a	DET	DT	Definite=Ind|PronType=Art	23	det	_	_
23	helicopter	helicopter	NOUN	NN	Number=Sing	20	nmod	_	SpaceAfter=No
24	.	.	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | a rotor | a part |  |  |  | of a machine | tree rules |
| 2 | **turn** | present | a machine |  |  |  |  | round *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## Meaning 2 {#m2}

<!-- .ven lang=en -->
A rotor is the spinning part inside an electric motor or generator.

```conllu
# sent_id = dict:school:rotor:m2:1
# text = A rotor is the spinning part inside an electric motor or generator.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	rotor	rotor	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
5	spinning	spin	VERB	VBG	VerbForm=Ger	6	amod	_	_
6	part	part	NOUN	NN	Number=Sing	0	root	_	_
7	inside	inside	ADP	IN	_	10	case	_	_
8	an	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
9	electric	electric	ADJ	JJ	Degree=Pos	10	amod	_	_
10	motor	motor	NOUN	NN	Number=Sing	6	nmod	_	_
11	or	or	CCONJ	CC	_	12	cc	_	_
12	generator	generator	NOUN	NN	Number=Sing	10	conj	_	SpaceAfter=No
13	.	.	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **spin** | gerund |  |  |  |  |  |  | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 2 | **is a** | present | a rotor | the spinning part |  | a electric motor or generator |  |  | tree rules |

## Meaning 3 {#m3}

<!-- .ven lang=en -->
In a wind turbine, the rotor is the hub with its blades that the wind turns.

<!-- fold The tree, 16 words -->
```conllu
# sent_id = dict:school:rotor:m3:1
# text = In a wind turbine, the rotor is the hub with its blades that the wind turns.
1	In	in	ADP	IN	_	4	case	_	_
2	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
3	wind	wind	NOUN	NN	Number=Sing	4	compound	_	_
4	turbine	turbine	NOUN	NN	Number=Sing	10	obl	_	SpaceAfter=No
5	,	,	PUNCT	,	_	4	punct	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	rotor	rotor	NOUN	NN	Number=Sing	10	nsubj	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	cop	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	hub	hub	NOUN	NN	Number=Sing	0	root	_	_
11	with	with	ADP	IN	_	13	case	_	_
12	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	13	nmod:poss	_	_
13	blades	blade	NOUN	NNS	Number=Plur	10	appos	_	_
14	that	that	SCONJ	IN	_	17	mark	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	wind	wind	NOUN	NN	Number=Sing	17	nsubj	_	_
17	turns	turn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	13	advcl	_	SpaceAfter=No
18	.	.	PUNCT	.	_	10	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the rotor | the hub |  | a wind turbine |  |  | tree rules |
| 2 | **turn** | present | the wind |  |  |  |  |  | vn roll-51.3.1 «NP.theme V»: agent=Theme |

## Example 1 {#x1}

<!-- .ven lang=en -->
The helicopter's rotor began to spin.

```conllu
# sent_id = dict:school:rotor:x1:1
# text = The helicopter's rotor began to spin.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	helicopter	helicopter	NOUN	NN	Number=Sing	4	nmod:poss	_	SpaceAfter=No
3	's	's	PART	POS	_	2	case	_	_
4	rotor	rotor	NOUN	NN	Number=Sing	5	nsubj	_	_
5	began	begin	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	spin	spin	VERB	VB	VerbForm=Inf	5	xcomp	_	SpaceAfter=No
8	.	.	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **begin** | past | the helicopter's rotor |  |  |  |  |  | vn begin-55.1-1-1 «NP V S\_INF»: agent=Agent clause=Eventuality |
| 2 | **spin** | to-infinitive | the helicopter's rotor *not said here* |  |  |  |  |  | vn roll-51.3.1 «NP.theme V»: agent=Theme |

## Example 2 {#x2}

<!-- .ven lang=en -->
The tail rotor stops the helicopter turning round.

```conllu
# sent_id = dict:school:rotor:x2:1
# text = The tail rotor stops the helicopter turning round.
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	tail	tail	NOUN	NN	Number=Sing	3	compound	_	_
3	rotor	rotor	NOUN	NN	Number=Sing	4	nsubj	_	_
4	stops	stop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	helicopter	helicopter	NOUN	NN	Number=Sing	4	obj	_	_
7	turning	turn	VERB	VBG	VerbForm=Ger	6	acl	_	_
8	round	round	ADV	RB	_	7	advmod	_	SpaceAfter=No
9	.	.	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stop** | present | the tail rotor | the helicopter |  |  |  |  | vn stop-55.4-1-1 «NP V NP.eventuality»: agent=Subeventuality helicopter=Eventuality |
| 2 | **turn round** | gerund | the helicopter *not said here* |  |  |  |  | round *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

## Example 3 {#x3}

<!-- .ven lang=en -->
The wind turned the rotor of the turbine.

```conllu
# sent_id = dict:school:rotor:x3:1
# text = The wind turned the rotor of the turbine.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	wind	wind	NOUN	NN	Number=Sing	3	nsubj	_	_
3	turned	turn	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	rotor	rotor	NOUN	NN	Number=Sing	3	obj	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	turbine	turbine	NOUN	NN	Number=Sing	5	nmod	_	SpaceAfter=No
9	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | past | the wind | the rotor of the turbine |  |  |  |  | vn roll-51.3.1 «NP V NP.theme»: agent=Agent rotor=Theme |

## Example 4 {#x4}

<!-- .ven lang=en -->
Inside the motor, the rotor spins very fast.

```conllu
# sent_id = dict:school:rotor:x4:1
# text = Inside the motor, the rotor spins very fast.
1	Inside	inside	ADP	IN	_	3	case	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	motor	motor	NOUN	NN	Number=Sing	7	obl	_	SpaceAfter=No
4	,	,	PUNCT	,	_	3	punct	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	rotor	rotor	NOUN	NN	Number=Sing	7	nsubj	_	_
7	spins	spin	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	very	very	ADV	RB	_	9	advmod	_	_
9	fast	fast	ADV	RB	Degree=Pos	7	advmod	_	SpaceAfter=No
10	.	.	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **spin** | present | the rotor |  |  | the motor |  | fast *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme inside motor=Trajectory |

## Example 5 {#x5}

<!-- .ven lang=en -->
We dropped paper rotors from the stairs and timed them.

```conllu
# sent_id = dict:school:rotor:x5:1
# text = We dropped paper rotors from the stairs and timed them.
1	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	2	nsubj	_	_
2	dropped	drop	VERB	VBD	Mood=Ind|Number=Plur|Person=1|Tense=Past|VerbForm=Fin	0	root	_	_
3	paper	paper	NOUN	NN	Number=Sing	4	compound	_	_
4	rotors	rotor	NOUN	NNS	Number=Plur	2	obj	_	_
5	from	from	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	stairs	stair	NOUN	NNS	Number=Plur	2	obl	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	timed	time	VERB	VBD	Mood=Ind|Number=Plur|Person=1|Tense=Past|VerbForm=Fin	2	conj	_	_
10	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	9	obj	_	SpaceAfter=No
11	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drop** | past | We | paper rotors |  | the stairs |  |  | vn put\_direction-9.4 «NP V NP PP.destination»: agent=Agent rotor=Theme from stair=Destination |
| 2 | **time** | past | We *not said here* | rotors *= rotor* |  |  |  |  | vn register-54.1-2 «NP V NP»: agent=Agent they=Theme |

## Example 6 {#x6}

<!-- .ven lang=en -->
Stay away from the rotor blades when the helicopter lands.

```conllu
# sent_id = dict:school:rotor:x6:1
# text = Stay away from the rotor blades when the helicopter lands.
1	Stay	stay	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	away	away	ADV	RB	_	1	advmod	_	_
3	from	from	ADP	IN	_	6	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
5	rotor	rotor	NOUN	NN	Number=Sing	6	compound	_	_
6	blades	blade	NOUN	NNS	Number=Plur	2	obl	_	_
7	when	when	ADV	WRB	PronType=Int	10	advmod	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	helicopter	helicopter	NOUN	NN	Number=Sing	10	nsubj	_	_
10	lands	land	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	acl:relcl	_	SpaceAfter=No
11	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stay away** | imperative | you *not said here* |  |  |  |  | away *property* | vn exist-47.1 «NP V»: agent=Theme |
| 2 | **land** | present | the helicopter |  |  |  |  |  | vn pocket-9.10-1 «NP V»: agent=Theme |

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