flutter🔊

To flap or wave quickly but irregularly.

Of a winged animal: to flap the wings without flying; to fly with a light flapping of the wings.

(aerodynamics) To undergo divergent oscillations (potentially to the point of causing structural failure) due to a positive feedback loop between elastic deformation and aerodynamic forces.

To cause something to flap.

To drive into disorder; to throw into confusion.

To be in a state of agitation or uncertainty.

(obsolete) To be frivolous.

(espionage, slang) To subject to a lie detector test.

The act of fluttering; quick and irregular motion.

A state of agitation.

An abnormal rapid pulsation of the heart.

(aerodynamics) An extremely dangerous divergent oscillation caused by a positive feedback loop between the elastic deformation of an object and the aerodynamic forces acting on it, potentially resulting in rapid structural failure.

(British) A small bet or risky investment.

A hasty game of cards or similar.

(audio, electronics) The rapid variation of signal parameters, such as amplitude, phase, and frequency.