Search Dictionary
Definition of millimeter

millimeter

/ˈmɪl.əˌmiː.tɚ/
(UK: millimetre)
mil · li · me · ter
Plural:millimeters
•
Adjective:millimetric
JUMP TO:

millimeter Lexical Profile

millimeter Game Scores & Validity

• noun

1

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

Example

"The architect measured the gap carefully, finding it to be exactly three millimeters wide."

2

American A tiny or almost imperceptible amount of distance.

Example

"The heavy steel door refused to budge even a single millimeter despite their combined efforts."

Synonyms
View all synonyms for millimeter

• Rhymes for millimeter

• Nearby Words

milliammeter
milligauss
milligram
millimeter
million bells
millipede
millstone

Word Origin & Etymology

Borrowed from French 'millimètre', formed from the Latin prefix 'milli-' (one thousandth) and 'mètre' (meter), ultimately deriving from the Greek 'metron' (measure).

Cite this Entry

Wordmom. (2026). Definition of Millimeter. In Wordmom Dictionary. Retrieved Oct 13, 2026, from https://wordmom.com/dictionary/millimeter
Wordmom is your complete guide to the English language. Whether you're looking up a definition, searching for the perfect synonym, or unscrambling letters for a word game, our comprehensive suite of tools is designed to help you find the right word, every time.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE®, Words With Friends®, Wordle®, and related game titles or tournament codes are registered trademarks of their respective owners (including Hasbro, Mattel, Zynga, The New York Times, NASPA, and WESPA). Wordmom is an independent reference utility for educational and entertainment purposes, not affiliated with, sponsored, or endorsed by these entities. All game names are referenced strictly under nominative fair use for compatibility.