whistle /ˈwisl/ I. vi. 吹口哨，鸣汽笛：The train whistled. 火车鸣笛。The policeman whistled for the motorcar to stop. 警察吹警笛命汽车停住。‖II. n. ［c］ 1.口哨，汽笛：boat whistle 船的汽笛；blow a police whistle 鸣警笛 2.口哨声，汽笛声：the whistle of a distant train (steam-engine)远处火车（蒸汽机）的汽笛声