(music) To play (a musical instrument) at a gig. / (US, military) To impose a demerit (on someone) for an infraction of a military deportment or dress code.

(transitive) To make a joke, often condescendingly, at the expense of (someone); to make fun of.

(transitive) To spear (fish, etc.) with a gig or fizgig. / (intransitive) To catch or fish with a gig or fizgig.

Originally (music), a performing engagement by a musician or musical group; (by extension, film, television, theater) a job or role for a performer.

(obsolete) A frivolous, playful, or wanton young woman; a giglet or giglot.

(obsolete) A top which is made to spin by tying a piece of string around it and then throwing it so that the string unwinds rapidly; a whipping-top.

(informal, computing) Clipping of gigabyte (“one billion (1,000,000,000) bytes”). / (slang, chiefly sciences) Any unit of measurement having the SI prefix giga-.

(fishing) Synonym of fishgig or fizgig (“a spear with a barb on the end of it, used for catching fish, frogs, or other small animals”).

present participle of gig

(film, music, television, theater) The act of engaging in a musical performance, acting in a theatre production, etc.