/ˈaʊtdɔ:(r) ||; ˈaυtˌdɔr/adj (only before a noun 只用于名词前) happening, done, or used outside, not in a building 户外的；露天的；供户外使用的: an outdoor swimming pool 室外游泳池outdoor clothing/activities 户外穿的衣服；户外活动 [OPP] indoor 反义词为indoor