When you show up on your own at a social function, you are unaccompanied, meaning you’ve got no date.

Use the word unaccompanied to describe someone who is "flying solo," meaning without a date or companion. You may have seen signs on doors of stores that say "No unaccompanied children allowed." This means kids need to have an adult with them, presumably because the store is full of breakables. In music, if you play or sing a solo, you are unaccompanied by other musicians or singers. If you perform that solo while at a party, without a date, then you’re unaccompanied on both levels.

Definitions of unaccompanied
  1. adjective
    being without an escort
    alone, lone, lonely, solitary
    lacking companions or companionship
    isolated, marooned, stranded
    cut off or left behind
    alone and on your own
    lacking accompaniment or a guard or escort
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    having companions or an escort
  2. adjective
    (of a state or an event) taking place without something specified occurring at the same time
    “a headache unaccompanied by other symptoms”
    independent; not united or joint
  3. adjective
    playing or singing without accompaniment
    “the soloist sang unaccompanied
    a cappella
    sung without instrumental accompaniment
    composed or performed by a single voice or instrument
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    accompanied, attended
    playing or singing with instrumental or vocal accompaniment
  4. adverb
    without anybody else or anything else
    synonyms: alone, solo
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