What is Fly ?
Fly is (verb) 1. to move through the air using wings or to travel in a plane When the cat came into the garden, the birds flew away. Some birds fly to Africa for the winter. I’m flying to China next week. He flies across the Atlantic twice a month. 2. to make a plane move through the air The king was flying his own plane. 3. to move people or goods by plane from one place to another They flew the injured skier home early. 4. to travel fast I must fly if I want to get home by 6 o’clock. His daughter is already two how time flies! to fly into a rage or temper to become suddenly very angry 5. to have a flag up The ship was flying the Russian flag. (NOTE: flying flew has flown ) (noun) 1. a small insect which lays its eggs on food He tried to kill the fly with a newspaper. Waiter, there’s a fly in my soup! 2. the front fastening on a pair of trousers Look out your fly’s undone. (NOTE: also called flies) 3. an object made in the shape of an insect and used when fishing (NOTE: [all (noun) senses] The plural is flies.)
source: Easier English, Student Dictionary Upper Intermediate Level