/flæp; flæp/
n
1 ~(of sth) flat piece of material that covers an opening or hangs down （用以覆盖开口的或垂下的）扁平物
*the flap of an envelope 信封的封盖
* the flap of a tent, pocket, etc 帐篷的帘、衣袋的盖
* the flap of a table, ie an extra hinged section that hangs down when not in use 桌子的活边（以铰链与桌面相连, 不用时可以垂下）.
2 part of the wing on an aircraft that can be lifted in flight to change the aircraft's upward direction （飞行器的）襟翼. =>illus at aircraft 见aircraft插图.
3 action or sound of flapping; light blow, usu with something flat 拍打; 拍打声; 轻击（通常指用扁平物击打）.
4 (idm 习语) be in/get into a flap (infml 口) be in/get into a state of agitation, confusion, nervous excitement, etc 处于忐忑不安、慌乱、紧张、激动等的状态
*I got into a real flap when I lost my keys. 我丢了钥匙, 心里发慌.

/flæp; flæp/
v (-pp-)
1 [I, Tn] (cause sth to) move, swing, wave, etc up and down or from side to side, usu making a noise （使某物）上下或左右移动、摆动、摇动等（通常发出声响）
*The sails were flapping gently in the wind. 船帆随风摆动.
* The bird flapped its wings and flew away. 那鸟振翅飞去.
2 [Ipr, Tn.pr] (attempt to) give a light blow at (sth) with a flat object （用扁平物体）轻拍（某物）
*flap at a fly with a cloth/flap a cloth at a fly 用布来拍打苍蝇.
3 [I] (infml 口) become confused, excited or disturbed 困惑; 激动; 不安
*There's no need to flap! 不必惊慌!
4 (phr v) flap across, away, by, etc (of a bird) fly in the specified direction by moving its wings （指鸟）振翅而飞
*The heron flapped slowly off across the lake. 那白鹭振翅向湖对岸慢慢飞去.