IPA: /ˈkoʊtˌruːm/
KK: /ˈkoʊtˌrum/
A room where coats and other outer clothing can be left or stored temporarily, often found in public places like theaters or restaurants.
Please leave your coat in the coatroom before entering the dining area.
Coatroom → It is formed from "coat" (from Old French *cote*, meaning a garment or outer covering) and "room" (from Old English *rum*, meaning space or area). The word "coatroom" refers to a space designated for storing coats or outer garments.
Think of a 'garment' ('coat') being stored in a 'space' ('room') — that's what a coatroom is for.