- a temporary camp without tents or cover, used especially by soldiers or mountaineers（尤指士兵或登山者的）露营地, 露宿地。
no obj., with adverbial of place(bivouacked, bivouacking)
- stay in such a camp露营：
the party bivouacked for the night.
那一队人露营过夜。
词源
early 18th cent. (denoting a night watch by the whole army)： from French, probably from Swiss German bîwacht 'additional guard at night', apparently denoting a citizens' patrol supporting the ordinary town watch.