Flutter (animated short) definition

(1) The act of moving back and forth

(2) The motion made by flapping up and down

(3) A disorderly outburst or tumult

"They were amazed by the furious disturbance they had caused"

(4) Abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block

(5) Wink briefly

"Bat one's eyelids"

(6) Move back and forth very rapidly

"The candle flickered"

(7) Beat rapidly

"His heart palpitated"

(8) Move along rapidly and lightly; skim or dart

"The hummingbird flitted among the branches"

(9) Flag the wings rapidly or fly with flapping movements

"The seagulls fluttered overhead"