butterfly

Từ điển Oxford Advanced Learner 8th

but·ter·fly [butterfly butterflies] BrE [ˈbʌtəflaɪ] NAmE [ˈbʌtərflaɪ] noun (pl. but·ter·flies)
1. countable a flying insect with a long thin body and four large, usually brightly coloured, wings
•butterflies and moths
•She's like a butterfly. She flits in and out of people's lives.
2. uncountable a swimming stroke in which you swim on your front and lift both arms forward at the same time while your legs move up and down together
•She was third in the 200m butterfly (= a swimming race).
Idiom: ↑have butterflies

Word Origin:
Old English, from ↑butter + the insect ↑fly; perhaps from the cream or yellow colour of common species, or from an old belief that the insects stole butter.

Example Bank:
•The butterfly emerged from the pupa.

• Từ đồng nghĩa / Synonyms:
  butterfly stroke, chat up, flirt, dally, coquet, coquette, romance, philander, mash