Source : Webster's Revised Unabridged Dictionary (1913)

Indoor \In"door`\, a.
   Done or being within doors; within a house or institution;
   domestic; as, indoor work.

Source : WordNet®

indoor
     adj 1: located, suited for, or taking place within a building;
            "indoor activities for a rainy day"; "an indoor pool"
            [syn: {indoor(a)}, {inside}] [ant: {outdoor(a)}]
     2: within doors; "an indoor setting"