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knob lock

American

noun

a lock having a spring bolt moved by a knob or knobs, and a dead bolt moved by a key.

Etymology

Origin of knob lock

First recorded in 1805–15

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.