1an act of fluttering:there was a flutter of wings at the window
a state or sensation of tremulous excitement:her insides were in a flutter
[mass noun] Medicine disturbance of the rhythm of the heart that is less severe than fibrillation.
[mass noun] Aeronautics undesired oscillation in a part of an aircraft under stress.
[mass noun] Electronics rapid variation in the pitch or amplitude of a signal, especially of recorded sound.Compare with wow2.
2British informal a small bet:a flutter on the horses
ზმნა
Universal
(of a bird or other winged creature) fly unsteadily or hover by flapping the wings quickly and lightly:a couple of butterflies fluttered around the garden
[with object] (of a bird or other winged creature) flap (its wings) quickly and lightly.
move with a light irregular or trembling motion:flags of different countries fluttered in the breeze (as adjective fluttering)a fluttering banner
[with adverbial of direction] (of a person) move restlessly or uncertainly:Mavis fluttered about nervously
(of a pulse or heartbeat) beat feebly or irregularly.
flutter one's eyelashes
open and close one’s eyes rapidly in a coy, flirtatious manner.