Meaning & use

millimeter

noun·Everyday

A unit of length equal to one thousandth of a meter.

See it in a sentence

The tiny screw's head measures just six millimeters across at its widest point.

A single millimeter of rain barely dampened the dry, cracked soil.

A note on using this word

British English spells this word millimetre; American English uses millimeter.

Words with a similar meaning

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