1. • noun - the act of moving back and forth
   • noun - abnormally rapid beating of the auricles of the heart (especially in a regular rhythm)
   • noun - a disorderly outburst or tumult
   • noun - the motion made by flapping up and down
   • verb - move along rapidly and lightly
   • verb - move back and forth very rapidly
   • verb - flap the wings rapidly or fly with flapping movements
   • verb - beat rapidly
   • verb - wink briefly
2. • To wave or flap rapidly in an irregular manner: curtains that fluttered in the breeze.
   • To fly by a quick, light flapping of the wings.
   • To flap the wings without flying.
   • To move or fall in a manner suggestive of tremulous flight: “Her arms rose, fell, and fluttered with the rhythm of the song” (Evelyn Waugh).
   • To vibrate or beat rapidly or erratically: My heart fluttered wildly.
   • To cause to flutter: “fluttering her bristly black lashes as swiftly as butterflies’ wings” (Margaret Mitchell).
   • The act of fluttering.
   • A condition of nervous excitement or agitation: Everyone was in a flutter over the news that the director was resigning.
   • A commotion; a stir.
   • Abnormally rapid pulsation, especially of the atria or ventricles of the heart.
   • Rapid fluctuation in the pitch of a sound reproduction resulting from variations in the speed of the recording or reproducing equipment.
   • A small bet; a gamble: “If they like a flutter, Rick will get them better odds than the bookies” (John le Carré).
3. • v - to wave rapidly and irregularly

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