Meaning : An area within a building enclosed by walls and floor and ceiling.
Example :
The rooms were very small but they had a nice view.
Meaning : Space for movement.
Example :
Room to pass.
Make way for.
Hardly enough elbow room to turn around.
Synonyms : elbow room, way
Meaning : Opportunity for.
Example :
Room for improvement.
Meaning : The people who are present in a room.
Example :
The whole room was cheering.