[fly.ing] adj (bef. 12c) 1 a: moving or capable of moving in the air b: moving or made by moving rapidly "~ feet" "a ~ leap" c: very brief
2: intended for ready movement or action "a ~ squad car"
3: having stylized wings--used esp. of livestock brand marks
4: of or relating to the operation of aircraft "a ~ club"
5: traversed or to be traversed (as in speed-record trials) after a running start "a ~ kilometer" -- with flying colors : with complete or eminent success
[2]flying n (1548) 1: travel by air
2: the operation of an aircraft or spacecraft