1. (n.) A piece of timber having a groove in which something glides.

2. (n.) One of the side scenes of the stage in a theater, or the space included between the side scenes.

L R acting area airstrip apron stage backstage band shell bandstand bib board bridge clearway coulisse dock dressing room fairway flies flight deck fly floor fly gallery forestage greenroom grid gridiron landing deck landing strip lightboard orchestra orchestra pit performing area pinafore pit proscenium proscenium stage runway shell smock stage stage left stage right strip switchboard the boards tucker wings