vane /vein; ven/ n 1 arrow or pointer on the top of a building, turned by the wind so as to show its direction. 風(fēng)向標(biāo); 風(fēng)信旗。 2 blade of a propeller, sail of a windmill, or other flat surface acted on by wind or water. (俗) 旋槳、風(fēng)車、水輪等的) 葉; 翼。