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# undefined

adjective (undefined)

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

## Everyday

1. Undefined means not clearly explained, described or fixed, like an undefined plan. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#m1)
2. Undefined means without a clear shape or outline. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#m2)
3. (maths) A calculation is undefined when it has no meaning or answer, like dividing a number by zero. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#m3)
4. (computing) A variable or value is undefined when it has not been given a value yet. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#m4)

### In the lessons

Important in maths: «6 ÷ 0 is undefined», because no number times 0 gives 6. In computing lessons, «undefined» appears as an error when something has no value. In everyday talk: «an undefined role» means nobody said exactly what the job is.

### Examples

- Dividing a number by zero is undefined. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x1)
- The shape had undefined edges in the fog. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x2)
- Her job in the team was still undefined. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x3)
- The program printed «undefined» because the box was empty. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x4)
- The rules of the new game were undefined, so we argued. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x5)
- The muscles were undefined under his baggy shirt. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x6)
- He was the first {212} to introduce the art of sculpture in its higher development, for before his time statues were merely rude representations, having the limbs altogether undefined. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/U/undefined/#x7)

### Note

In maths, «undefined» is not the same as 0: 0 ÷ 6 = 0, but 6 ÷ 0 is undefined. «Define» means to give the exact meaning. Opposite: «defined».

## On Mova

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