boa /'baoa; 'boa/ n 1 (also 亦作 'boa-constrictor) large non-poisonous snake that kills by crushing its prey. 蟒蛇(無毒之巨蛇，能絞殺其捕獲物以食之)。 → the illus at snake, 參看 snake 之插圖。 2 (also 赤作 'feather-boa) feather stole (formerly) worn by women. (昔時(shí))婦女所用之羽毛披肩。