Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fly”

fly

verb  /flɑɪ/ (past tense flew  /flu/, past participle flown  /floʊn/) us  

fly verb (TRAVEL THROUGH AIR)

[I/T] (of creatures, objects, or aircraft) to move through the air, or (of people) to travel by aircraft: [I] The building just exploded, and glass flew through the air. [I] We enjoy watching the birds fly over the water. [I] Are you planning to fly or drive to Toronto? [I] Some of our pilots have been flying (= operating an aircraft) for 20 years. [I/T] What airline are you flying (on) (= traveling on as a passenger)?

fly verb (MOVE QUICKLY)

[I] to move or go quickly or suddenly: Theo was startled when the door flew open. Saying she was late, Cathy flew by me and ran outside. The summer seems to have flown by (= passed quickly).

fly verb (WAVE)

[I/T] to move around in the air while being held at one end, or to cause something attached at one end to be moved: [I] Flags flew from the front of every house.

fly

noun  /flɑɪ/ us  

fly noun (INSECT)

[C] a small insect with two wings

fly noun (PANTS)

[C usually sing] the covered opening at the front of a pair of pants

fly noun (BALL)

[C] (also fly ball,  /ˈflɑɪˈbɔl/) in baseball, a ball that has been hit high into the air: He caught the fly in deep center field.
(Definition of fly from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of fly?
Browse related topics

You are looking at an entry to do with Difficult things and people, but you might be interested in these topics from the Easy and difficult topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “fly” in other dictionaries

Word of the Day

see the light of day

When something sees the light of day, it appears for the first time.

Word of the Day

Highly delighted, bitterly disappointed, ridiculously cheap: adverbs for emphasis.

by Liz Walter,
October 22, 2014
We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More