solo

(noun) any activity that is performed alone without assistance.

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

(noun) a flight in which the aircraft pilot is unaccompanied.

(verb) fly alone, without a co-pilot or passengers.

(verb) perform a piece written for a single instrument.

(adj) composed or performed by a single voice or instrument. Example: "A passage for solo clarinet."

(adv) without anybody else or anything else. Synonyms: alone, unaccompanied. Examples: "The child stayed home alone." "The pillar stood alone, supporting nothing." "He flew solo."