DictionaryAI

bra

noun
SayBRAHUS/bɹɑ//bɹɑː/

Pluralbras

3 meanings of bra

Practice

  1. 1
    underwearnouncountable
    A piece of underwear, typically worn by women to support the breasts.

    A well-fitted bra can improve comfort throughout the day.

    Many sports bras are designed to limit movement during exercise.

    Similarbrassiere

  2. 2
    friendnounslang
    Another spelling of bro: a friend or buddy, often used as a casual, friendly form of address, mainly to a man.

    No worries, bra, I've got your back.

    Slow down, bra, there's no rush to finish this.

    Note

    Spelled the way some speakers pronounce bro, this form is used mainly as a friendly term of address. It also shows up in dialogue written to sound like speech, as in Todd Johnson's Influence (2009).

    Checked 2 Nov 2026 · 2 facts

Less common meaning

  1. 3
    noun
    In quantum mechanics, the row vector in the standard notation for describing a quantum state; its paired column vector is the ket.

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Origins

Meaning 1

The word is short for brassiere, which English borrowed from French brassière. Its source is Old French braciere, first a lining inside armor that protected the arm and later a garment, built on Old French brace ("arm"). Further back are Latin bracchium ("forearm") and Ancient Greek brakhíōn, and ultimately a Proto-Indo-European root meaning "short."

Meaning 2

Representing a different pronunciation of bro ("brother").

Checked 31 Oct 2026 · 1 fact