tack /tæk/ I. n. ［c］1.平头钉：a thumb tack图钉；a tack rivet 定位铆钉 2.（帆船等的）航向：The capital ordered a change of tack.船长命令改变航向。3.行动步骤；方针：be on the wrong(right)tack方针错误（正确）；try another tack改变方针 ‖II. vt. & vi.1. 钉住：tack a notice on a bulletin 把通知钉在布告板上 2. 抢风转变航向；突然改变行动：tack about抢风转向；tack with the wind 顺风转向