Definitions:
a live performance by a musician or group playing popular or jazz music

a job, especially one that is temporary or freelance and performed on an informal or on-demand basis

(of a musician or group) perform a gig or gigs

a light two-wheeled carriage pulled by one horse.

a light, fast, narrow boat adapted for rowing or sailing.

a device similar to a harpoon, used for catching fish.

fish using a gig.