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Definition of tachometer
tachometer
/tæˈkɑːmɪtər/
ta · chom · e · ter
Plural:tachometers
•Adjective:tachometric
tachometer Lexical Profile
CEFR
B2
Grade
8
Tier
2
Usage
Top 10k
tachometer Game Scores & Validity
Scrabble US
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WWF
Wordle Guess
• noun
1
An instrument that measures the working speed of an engine, typically displaying the revolutions per minute (RPM) of a revolving shaft.
Example
"The driver kept a close eye on the tachometer to ensure the engine did not exceed its safe operational limits during the race."
Synonyms
View all synonyms for tachometer• Rhymes for tachometer
Word Origin & Etymology
Coined in the early 19th century from the Greek 'takhos' (speed) combined with the suffix '-meter' (denoting an instrument used to measure).
Cite this Entry
Wordmom. (2026). Definition of Tachometer. In Wordmom Dictionary. Retrieved Oct 15, 2026, from https://wordmom.com/dictionary/tachometer