|1.||[ adjective ] streaming or flapping or spreading wide as if in a current of air|
|Synonyms:||waving aflare flying flaring|
"ran quickly, her flaring coat behind her" "a fluttering scarf" "flying banners" "flags waving in the breeze"
|2.||[ adjective ] moving rapidly and lightly to and fro as of or with wings|
"fluttering birds" "the flittering wings of a fledgling"
|3.||[ adjective ] having a slight and rapid trembling motion|
"a fluttering heartbeat" "palpitant movements rather than violent eruptions" "my palpitating heart"
|4.||[ noun ] (physics) the motion made by flapping up and down|
|Synonyms:||flapping flopping flutter flap|
|Related terms:||wave undulate flicker flap beat|