solo - noun

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

solo - verb

• fly alone, without a co-pilot or passengers
• perform a piece written for a single instrument

solo - adjective

• composed or performed by a single voice or instrument

solo - adverb

• without anybody else or anything else

solo - thesaurus

alone   unaccompanied