flutter has definitions from the fields of physics,medicine
1
[ noun ] the act of moving back and forth

Synonyms

flicker waver

Used in print

(Helen Hooven Santmyer, "There Were Fences"...)

From above one could only occasionally catch_a_glimpse of life on the floor of this green sea : a neighbor 's gingham skirt flashing into sight for an instant on the path beneath her grape-arbor , or the movement of hands above a clothesline and the flutter of garments hung there , half-way down the block .

Related terms

motion flicker falter fluctuate

2
[ verb ] move back and forth very rapidly, as of a candle

Related terms

move_back_and_forth waver

3
[ verb ] move along rapidly and lightly; skim or dart

Synonyms

dart flit fleet

Used in print

(Clifford Irving, The Valley....)

Lester 's hand fluttered to Cabot 's shoulder .

Related terms

travel_rapidly butterfly dart

4
[ noun ] a disorderly outburst or tumult

Examples

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

5
[ verb ] beat rapidly, of the heart

Synonyms

palpitate

Related terms

beat palpitate

6
[ noun ] (medicine) abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block
7
[ verb ] wink briefly

Synonyms

bat

Examples

"bat one's eyelids"

Related terms

blink

8
[ noun ] (physics) the motion made by flapping up and down

Related terms

wave undulate flicker flap beat

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