Search Dictionary
Definition of tach

tach

/tæk/
tach
Plural:tachs
JUMP TO:

tach Lexical Profile

tach Game Scores & Validity

• noun

1

A tachometer, an instrument that measures the rotation speed of a shaft or disk, especially in a motor vehicle's engine.

Example

"The driver kept a close eye on the tach before shifting into fourth gear."

Synonyms
View all synonyms for tach

• Rhymes for tach

• Nearby Words

tabulate
tabulation
tacca
tach
tache
tachograph
tachometer

Word Origin & Etymology

Coined in the early 20th century as an informal clipping of 'tachometer', which derives from Ancient Greek 'tachos' (speed) and '-metron' (measure).

Cite this Entry

Wordmom. (2026). Definition of Tach. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/tach
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
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® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.