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flutter
WIKTIONARY
flutter
Verb
  • To flap or wave quickly but irregularly. intransitive
  • To flap the wings without flying; to fly with a light flapping of the wings. intransitive, of a winged animal
  • To cause something to flap. transitive
  • To drive into disorder; to throw into confusion. transitive
Noun
  • The act of fluttering; quick and irregular motion.
  • A state of agitation.
  • An abnormal rapid pulsation of the heart.
  • A small bet or risky investment. Britain
  • The rapid variation of signal parameters, such as amplitude, phase, and frequency. audio, electronics