speedometer
Americannoun
noun
-
An instrument for indicating the speed of a vehicle, typically by measuring the rate of rotation of a wheel or fan whose rate of rotation depends on the speed of the vehicle.
-
Compare odometer
Etymology
Origin of speedometer
Explanation
The device in a car that measures how fast you're going is the speedometer. Most speedometers can measure as much as 160 miles per hour — even though it's illegal to drive that fast in the U.S. The traditional speedometer is a dial with a needle that moves to the right as you press on the gas pedal. Sometimes these devices simply display the digital numeric value of your speed, registering 50 and then 48 as the driver begins to slow down. Speedometers began to be a standard feature in automobiles around 1910, just a bit after the word was coined by adding the Greek-derived suffix -meter, or "a measure," to speed.
Vocabulary lists containing speedometer
Frankenwords: Words with Roots from Different Languages
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meter, metr
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The reading on the speedometer this week is 9.6, the highest since March 2006.
From MarketWatch • Feb. 6, 2026
With “Eddington,” Aster attempts to chronicle how we reached this moment, holding a speedometer to the commotion and tracking how quickly it all fell apart.
From Salon • Jul. 20, 2025
The speedometer was frozen on 65mph and could have been travelling at 70mph or faster on impact, police found.
From BBC • Mar. 27, 2025
The clock measures how fast a person's body is deteriorating as they grow older, "like a speedometer for the biological processes of aging," explained Belsky.
From Science Daily • Mar. 14, 2024
Even when I’m using my car, I drive by my watch, not my speedometer.
From "The Autobiography of Malcolm X" by Alex Malcolm X;Hailey
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
