[attrib.]situated, conducted, or used within a building or under cover 室内的,户内的 indoor sports. 室内运动。 ■of or relating to sports played indoors (与)室内运动(有关)的 the national indoor champion. 全国室内运动冠军。
语源
early 18th cent. (superseding earlier within-door): from in (as a preposition) + doorCompare with indoors