(dated or formal) A bedsit.

(dated, psychotherapy) A small encounter group meeting in a private home.

plural of living room group

A place within a co-location centre where telecommunications companies can physically connect to one another and exchange data without incurring local loop fees.

plural of room temperature I.Q.

Alternative form of locker room talk

A data room that is accessible online by connecting remotely.

(informal) Very little space (available) (of a very small room).

(simile) Extremely nervous.

(archaic) Characterised or marked by room or roominess; spacious.