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# invalid

«invalid» in Mova's school dictionary: **Not legally or officially acceptable, as in an invalid…** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

adjective (invalid — said in-VAL-id); noun (an invalid, invalids — said IN-va-lid)

### meaning for a pupil

1) (adjective) Not legally or officially acceptable, as in an invalid ticket. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#m1)

2) (adjective) Not correct or not based on good reasons, as in an invalid argument or invalid input. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#m2)

3) (noun, old and can be offensive) A person who is ill or disabled for a long time and needs care. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#m3)

### sense in the lessons

In everyday life: invalid tickets, passwords or passports are not accepted. In maths and computing: «invalid input» means the computer cannot use what you typed; an invalid answer does not fit the rules. In old stories: an invalid lies in bed. Today «invalid» for a person is considered old-fashioned or hurtful.

### examples

- This ticket is invalid — it's for yesterday's show. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x1)
- The password is invalid, try again. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x2)
- Your argument is invalid because you skipped a step. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x3)
- A cheque without a signature is invalid. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x4)
- Her passport was invalid, so she couldn't fly. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x5)
- In the old story, the invalid was cared for by his sister. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x6)
- It was warranted harmless to infants and invalids, so he felt quite safe. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/#x7)

### note

Two words with different stress: in-VAL-id (not valid) and IN-va-lid (a sick person). Opposite: valid. Verb: invalidate. Use «disabled person» or «person who is ill», not «an invalid».

### Trees and pragmatics

[Every meaning and example of «invalid» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/I/invalid/), each sentence with its dependency tree and frames.