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# validity

noun (validity)

«validity» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. Validity is how true, fair or correct something is, for example an argument or a test. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#m1)
2. (law) Validity is whether a document, ticket or rule is official and still accepted, for example a passport's validity. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#m2)

### In the lessons

In maths and logic it means an argument follows correctly from its premises. In science it means a test really measures what it should (a fair test). In everyday life it is about tickets, passports and cards that have not expired. Phrases: the validity of, check the validity, period of validity.

### Examples

- The scientist questioned the validity of the results. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#x1)
- Check the validity of your passport before you travel. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#x2)
- A fair test makes your experiment more valid; that is its validity. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#x3)
- The ticket's validity ends at midnight. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#x4)
- The judge looked at the validity of the will. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#x5)
- The teacher asked us to judge the validity of each argument. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/#x6)

### Note

Mostly uncountable. Adjective: valid; opposite: invalid. Trap in logic: an argument can be valid (the steps follow) even if a premise is false.

## On Mova

- [Trees and pragmatics of «validity» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/V/validity/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«validity» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/validity.html) on Mova free.