verb, flapped, flap⋅ping, noun | 1. | to swing or sway back and forth loosely, esp. with noise: A loose shutter flapped outside the window. |
| 2. | to move up and down, as wings; flap the wings, or make similar movements. |
| 3. | to strike a blow with something broad and flexible. |
| 4. | Slang. to become excited or confused, esp. under stress: a seasoned diplomat who doesn't flap easily. |
| 5. | to move (wings, arms, etc.) up and down. |
| 6. | to cause to swing or sway loosely, esp. with noise. |
| 7. | to strike with something broad and flat. |
| 8. | to toss, fold, shut, etc., smartly, roughly, or noisily. |
| 9. | Phonetics. to pronounce (a sound) with articulation resembling that of a flap: The British often flap their r's. |
| 10. | something flat and broad that is attached at one side only and hangs loosely or covers an opening: the flap of an envelope; the flap of a pocket. |
| 11. | either of the two segments of a book jacket folding under the book's front and back covers. |
| 12. | one leaf of a folding door, shutter, or the like. |
| 13. | a flapping motion. |
| 14. | the noise produced by something that flaps. |
| 15. | a blow given with something broad and flat. |
| 16. | Slang.
|
| 17. | Surgery. a portion of skin or flesh that is partially separated from the body and may subsequently be transposed by grafting. |
| 18. | Aeronautics. a movable surface used for increasing the lift or drag of an airplane. |
| 19. | Phonetics.
|
| 20. | Building Trades.
|

flap
|
flap (flāp)
n.
Tissue used in surgical grafting that is only partially detached from its donor site so that it continues to be nourished during transfer to the recipient site.