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limit switch

American  

noun

  1. a switch that automatically cuts off current to an electric motor when an object moved by it, as an elevator, has passed a given point.

Etymology

Origin of limit switch

First recorded in 1925–30

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.