- an instrument on an automobile or other vehicle for indicating the rate of travel in miles or kilometers per hour.
Origin of speedometer
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a device fitted to a vehicle to measure and display the speed of travelSee also mileometer
Word Origin and History for speedometer
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.