doorstop

UK: /ˈdɔː^rstɒp/ US: (dôr′stop′, dōr′-)

WordReference Random House Unabridged Dictionary of American English © 2025

door•stop  (dôr′stop′, dōr′-), n. 

1. Building a device for holding a door open, as a wedge or small weight.
2. Building Also called slamming stile, stop. (in a doorframe) a strip or projecting surface against which the door closes.
3. Building a device for preventing a door from striking a wall or an object on a wall, as a small rubber-covered projection.

• door + stop 1870–75, American.

Collins Concise English Dictionary © HarperCollins Publishers::

doorstop / ˈdɔːˌstɒp/ noun

1. a heavy object, wedge, or other device which prevents an open door from moving
2. a projecting piece of rubber, etc, fixed to the floor to stop a door from striking a wall