
Flap
    
    WordNet
        noun
(1)   Any broad thin and limber covering attached at one edge; hangs loose or projects freely
"He wrote on the flap of the envelope"
(2)   A movable airfoil that is part of an aircraft wing; used to increase lift or drag
(3)   A movable piece of tissue partly connected to the body
(4)   The motion made by flapping up and down
(5)   An excited state of agitation
"He was in a dither"
"There was a terrible flap about the theft"
verb
(6)   Pronounce with a flap, of alveolar sounds
(7)   Make a fuss; be agitated
(8)   Move noisily
"Flags flapped in the strong wind"
(9)   Move in a wavy pattern or with a rising and falling motion
"The curtains undulated"
"The waves rolled towards the beach"
(10)   Move with a flapping motion
"The bird's wings were flapping"
(11)   Move with a thrashing motion
        "The bird flapped its wings"
"The eagle beat its wings and soared high into the sky"
WiktionaryText
        Noun
- Anything broad and limber that hangs loose, or that is attached by one side or end and is easily moved; as, the flap of a garment.
 - A hinged leaf, as of a table or shutter.
 -  An upset, stir, scandal or controversy
- The comment caused quite a flap in the newspapers.
 
 - The motion of anything broad and loose, or a stroke or sound made with it; as, the flap of a sail or the flap of a wing
 - A disease in the lips of horses.
 - A hinged surface on the trailing edge of the wings of an aeroplane.
 - Vagina
 
Verb
- to move something broad and loose back and forth, as flap its wings
 -   to move loosely back and forth
- The flag flapped in the breeze.
 
 

