Meaning of the word "spare room" in English

What does "spare room" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

spare room

US /ˈspɛr ˌruːm/
UK /ˈspɛə ˌruːm/

Noun

a room in a house that is kept for visitors to sleep in

Example:
We converted the attic into a cozy spare room for guests.
Do you have a spare room where I can stay for the night?