The noun "room" can be both countable and uncountable.
Meaning: the space needed for something
Example sentence: Is there enough room in the yard for a swimming pool?
Meaning: a space inside a building with walls, a floor and a ceiling
Example sentence: She opened the door and entered a room full of beautiful old furniture.
Test your understanding:
- Is there a piano in his room?
- Is there room for his piano?