solo

any activity that is performed alone without assistance

a musical composition for one voice or instrument (with or without accompaniment)

a flight in which the aircraft pilot is unaccompanied

fly alone, without a co-pilot or passengers

perform a piece written for a single instrument

composed or performed by a single voice or instrument; "a passage for solo clarinet"

without anybody else or anything else; "the child stayed home alone"; "the pillar stood alone, supporting nothing"; "he flew solo"