Dictionary definition · flutter
noun
- the act of moving back and forth
- abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block
- a disorderly outburst or tumult"they were amazed by the furious disturbance they had caused"
- the motion made by flapping up and down
verb
- move along rapidly and lightly; skim or dart"The hummingbird flitted among the branches"
- move back and forth very rapidly"the candle flickered"
- flap the wings rapidly or fly with flapping movements"The seagulls fluttered overhead"
- beat rapidly"His heart palpitated"
- wink briefly"bat one's eyelids"
Source: Open English WordNet (CC BY 4.0).