Adjective

• S: (adj) unaccompanied (being without an escort)
• S: (adj) unaccompanied (playing or singing without accompaniment) "the soloist sang unaccompanied"
• S: (adj) unaccompanied ((of a state or an event) taking place without something specified occurring at the same time) "a headache unaccompanied by other symptoms"
• similar to
• antonym

Adverb

• S: (adv) alone, solo, unaccompanied (without anybody else or anything else) "the child stayed home alone"; "the pillar stood alone, supporting nothing"; "he flew solo"