flap

flap
(flapped, flapping)

[with obj.](of a bird) move (its wings) up and down when flying or preparing to fly
（鸟）拍动（翅膀），振翅
a pheasant flapped its wings.
一只野鸡拍动着双翼。
[no obj.]gulls flapped around uttering their strange cries.
海鸥振翅飞翔，叫声怪异。
■[no obj.](of something attached at one point or loosely fastened) flutter or wave around
（附着于一点或系得不紧的东西）摆动，飘动，飘舞
the sides of the tent had a tendency to flap about.
帐篷的四面像要飘起来了。
■move (one's arms or hands) up and down or to and fro
挥（臂）；挥（手）
■gesture at someone with (one's hand), especially in a dismissive way
用（手）向某人示意（尤指示意退下）
Bernice flapped a hand at him in dismissal.
伯尼斯一只手向他挥了挥，让他离开。
■[with obj. and adverbial of direction]strike or attempt to strike (something) loosely with one's hand, a cloth, or a broad implement, especially to drive it away
（尤指为驱赶而用手、布或扁平物）轻击；拍打
they flap away the flies with peacock tails.
他们用孔雀尾羽驱赶苍蝇。
■wave (something, especially a cloth) around or at something or someone
四下挥舞（某物，尤指布）；朝着…挥舞（某物，尤指布）
she flapped the duster angrily.
她愤怒地乱舞了一通掸子。
[no obj.](informal)be agitated or panicky
(非正式)焦虑不安；惊慌失措
it's all right, Mother, don't flap.
没事儿的，妈妈，不要慌张。

noun

a piece of something thin, such as cloth, paper, or metal hinged or attached on one side only, that covers an opening or hangs down from something
（布条、纸或只一端固定的金属件等）片状垂悬物；片状封口物
the flap of the envelope.
信封的封口。
he pushed through the tent flap.
他掀开帐篷的门帘走了进去。
■a hinged or sliding section of an aircraft wing used to control lift
（飞机的）襟翼
flaps are normally moved by the hydraulics.
襟翼通常由液压装置驱动。
[mass noun] a final approach at sixty knots with 45° of flap.
襟翼45°、速度60节的五边着陆。
■a large broad mushroom
伞形菇
■(Phonetics)a type of consonant produced by allowing the tip of the tongue to strike the palate very briefly
(语音)闪音
a movement of a wing or an arm from side to side or up and down
（翅膀的）振动；（手臂的）挥动
the surviving bird made a few final despairing flaps.
那只幸存下来的鸟最后绝望地抖动了几下翅膀。
■[in sing.]the sound of something making such a movement
翅膀的振动声；手臂的挥舞声
hear the coo of the dove, the flap of its wings.
听着鸽子的咕咕声，听着它双翅的拍动声。
[in sing.](informal)a state of agitation; a panic
(非正式)惊恐，恐慌；焦虑
they're in a flap over who's going to take Hugh's lectures.
他们因不知谁会受休的训斥而焦虑不安。

常用词组
someone's ears are flapping

(informal)someone is listening intently and in a nosy and intrusive way
(非正式)好管闲事地无礼偷听
your ears are flapping, Mr O’Brien !.
你在偷听吧，奥布赖恩先生。

派生
flappy
( )
adjective
语源

Middle English: probably imitative

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