| English > English | |
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| flutter | |
| 1. v. (intransitive) To flap or wave quickly but irregularly. |  |
| flags fluttering in the wind | |
| 2. v. (intransitive, of a winged animal) To flap the wings without flying; to fly with a light flapping of the wings. | |
| 3. v. To cause something to flap. | |
| A bird flutters its wings. | |
| 4. v. To drive into disorder; to throw into confusion. | |
| 5. v. (intransitive) To be in a state of agitation or uncertainty. | |
| 6. v. (intransitive, obsolete) To be frivolous. | |
| 7. n. The act of fluttering; quick and irregular motion. | |
| the flutter of a fan | |
| 8. n. A state of agitation. | |
| 9. n. An abnormal rapid pulsation of the heart. | |
| 10. n. (British) A small bet or risky investment. | |
| 11. n. (audio, electronics) The rapid variation of signal parameters, such as amplitude, phase, and frequency. | |
