TOP

Definition of firefly noun from the Oxford Advanced Learner's Dictionary

firefly

noun

/ˈfaɪəflaɪ/

/ˈfaɪərflaɪ/

(plural fireflies)

(North American English also lightning bug)

jump to other results

a flying insect with a tail that shines in the darkTopics Insects, worms, etc.c2

Questions about grammar and vocabulary?

Find the answers with Practical English Usage online, your indispensable guide to problems in English.

See firefly in the Oxford Advanced American Dictionary

Check pronunciation: firefly

Other results

All matches

firefly

Nearby words

noun

From the Word list

C1

Oxford Learner's Dictionaries Word of the Day