adv在户外(露天)(in the open air;out of doors)：We spent most of our holiday～.我们假期的大多数时间是在户外度过的。Don't go～if it is raining.如果下雨就不要到外面去。〖反〗 indoors;

n 室(户)外;露天地(area outside a house or building in the open air)：come in from the～从外面进来;the wildlife of the great～广阔原野的野生生物;He enjoys the great～too much.他酷爱野外的环境。

←outdoor adj