[green-room, -roo
m] 
| a lounge in a theater, broadcasting studio, or the like, for use by performers when they are not onstage, on camera, etc. |
| green·room (grēn'rōōm', -rŏŏm') n. A waiting room or lounge for the use of performers when they are offstage, as in a theater or concert hall. [So called because such rooms were originally painted green.] |