[Elamur Dictionary](https://md.dictionary.elamur.ai/free/en/) · [this page in HTML](https://dictionary.elamur.ai/free/en/english/millimetre/)

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# millimetre

noun (a millimetre, millimetres); millimeter (US)

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

## Everyday

A millimetre is a small unit of length; there are 10 millimetres in a centimetre and 1,000 in a metre. It is written mm. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#m1)

### In the lessons

In maths and science pupils measure small lengths in millimetres with a ruler: the width of a fingernail, rainfall in a rain gauge. Converting units: mm to cm to m. Phrases: to the nearest millimetre, millimetres of rain.

### Examples

- A millimetre is about the thickness of a credit card. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x1)
- Measure the line to the nearest millimetre. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x2)
- 10 millimetres make 1 centimetre. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x3)
- We had 25 millimetres of rain today. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x4)
- The ant is 6 mm long. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x5)
- 35 mm = 3.5 cm. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x6)
- The gap was only a millimetre wide. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x7)
- A metre has 1,000 millimetres. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/M/millimetre/#x8)

### Note

UK, Canada, Australia, NZ, Ireland spell "millimetre"; USA spells "millimeter". Symbol mm (no s, no full stop). "Milli-" means one thousandth. Maths: mm ÷ 10 = cm; mm ÷ 1,000 = m; cm × 10 = mm. Trap: do not mix up mm with ml (millilitre, for volume).

## On Mova

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