doorstop

American  

[dawr-stop] / ˈdɔrˌstɒp /

noun

1. a device for holding a door open, as a wedge or small weight.

2. Also called stop.  Also called slamming stile.  (in a doorframe) a strip or projecting surface against which the door closes.

3. a device for preventing a door from striking a wall or an object on a wall, as a small rubber-covered projection.

---

doorstop British  

/ 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

3. informal a very thick book

---

Etymology

Origin of doorstop

An Americanism dating back to 1870–75; door + stop