n (context|zoology) Any insect of the order Diptera; characterized by having two wings, also called true fly|true flies.
n (context|non-technical) Especially, any of the insects of the family (taxlink|Muscidae|family), such as the common housefly (other families of Diptera include mosquitoes and midges).
n (weightlifting) A chest exercise performed by moving extended arms from the sides to in front of the chest. (also flye)
v (intransitive) To travel through the air, another gas(,) or a vacuum, without being in contact with a grounded surface.
v (transitive|ergative) To cause to fly (gloss|travel by air or the like): to transport via air or the like.
n A strip of material hiding the zipper, buttons etc. at the front of a pair of trousers, pants, or underpants.
n (weightlifting) Exercises that evolve wide opening and closing of the arms perpendicular to the shoulders
v (intransitive|baseball) To hit a fly ball; to hit a fly ball that is caught for an out. Compare ground (verb) and line (verb).