Any activity that is performed alone without assistance.

Roget 415: music; concert; strain, tune, air; melody etc. 413; aria, arietta^†; piece of music [Fr.], work, number, opus; sonata; rondo, rondeau [Fr.]; pastorale, cavatina^†, roulade^†, fantasia, concerto, overture, symphony, variations, cadenza; cadence; fugue, canon, quodlibet, serenade, notturno [It], dithyramb; opera, operetta; oratorio; composition, movement; stave; passamezzo [It], toccata, Vorspiel [G.].    instrumental music; full score; minstrelsy, tweedledum and tweedledee, band, orchestra; concerted piece [Fr.], potpourri, capriccio.    vocal music, vocalism^†; chaunt, chant; psalm, psalmody; hymn; song etc. (poem) 597; canticle, canzonet^†, cantata, bravura, lay, ballad, ditty, carol, pastoral, recitative, recitativo^†, solfeggio^†.    Lydian measures; slow music, slow movement; adagio etc. adv.; minuet; siren strains, soft music, lullaby; dump; dirge etc. (lament) 839; pibroch^†; martial music, march; dance music; waltz etc. (dance) 840.    solo, duet, duo, trio; quartet, quartett^†; septett^†; part song, descant, glee, madrigal, catch, round, chorus, chorale; antiphon^†, antiphony; accompaniment, second, bass; score; bourdon^†, drone, morceau^†, terzetto^†.    composer etc. 413; musician etc. 416.    ... show more

Dutch: solo

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

Dutch: obligaat, obligaatstem, solo, solopartij
Polish: solo

A flight in which the aircraft pilot is unaccompanied.

Dutch: solo

Fly alone, without a co-pilot or passengers.

Dutch: soleren

Perform a piece written for a single instrument.

Composed or performed by a single voice or instrument.

Without anybody else or anything else:
— He flew solo.

synonyms: alone, unaccompanied.