Pronunciation: (flut'ur),[key] —v.i. 1. to wave, flap, or toss about: Banners fluttered in the breeze. 2. to flap the wings rapidly; fly with flapping movements.
3. to move in quick, irregular motions; vibrate.
4. to beat rapidly, as the heart.
5. to be tremulous or agitated.
6. to go with irregular motions or aimless course: to flutter back and forth.
—v.t. 1. to cause to flutter; vibrate; agitate.
2. to throw into nervous or tremulous excitement; cause mental agitation; confuse.
—n. 1. a fluttering movement: He made little nervous flutters with his hands. 2. a state of nervous excitement or mental agitation: a flutter of anticipation. 3. See flutter kick. 4. Audio.a variation in pitch resulting from rapid fluctuations in the speed of a recording. Cf. wow2 (def. 1).
5. Chiefly Brit.a small wager or speculative investment.