Definition of firefly in English:

firefly

Syllabification: fire·fly
Pronunciation: /ˈfī(ə)rˌflī
 
/

noun (plural fireflies)

A soft-bodied beetle related to the glowworm, the winged male and flightless female of which both have luminescent organs. The light is chiefly produced as a signal between the sexes, especially in flashes.
  • Family Lampyridae: many species
More example sentences
  • Later lab experiments showed that by flashing an artificial light at a firefly you could speed up its rhythm, you could slow it down, make it flash a little later than it would otherwise.
  • We were guided as we went by millions of fireflies whose flashing marked the banks like landing lights on an airstrip.
  • The firefly's light is only visible for an instant.

Definition of firefly in:

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Word of the day retroflex
Pronunciation: ˈretrəˌfleks
adjective
turned backward