[biv.ouac] n [F, fr. LG biwacht, fr. bi by + wacht guard] (ca. 1702) 1: a usu. temporary encampment under little or no shelter
2. a: encampment usu. for a night b: a temporary shelter or settlement
[2]bivouac vi -ouacked ; -ouack.ing (1809): to make a bivouac: camp