To vibrate or move quickly; as, a bird flutters its wings.
- 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 move quickly in a nervous, restless, or excited fashion; flit.
- 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.
- Pathology 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.
- Chiefly British A small bet; a gamble: "If they like a flutter, Rick will get them better odds than the bookies” ( John le Carré).