DictionaryAI

alter

AWL-tur/ˈɔl.təɹ/UKOL-tuh/ˈɒl.tə/

Formsalters, altering, altered

4 meanings of alter

Practice

  1. 1
    changeverbtransitive or intransitive
    To change, or to make something or someone different in some way.

    Like changing the shape of a lump of clay with your hands.

    You can alter the design before sending it to print.

    They altered the building to add two more rooms.

    UsageDon't mix up alter with altar, a table in a church.

    Similarchange, modify, adjust, adapt

    Note
  2. 2
    fit clothesverbtransitive
    To change a piece of clothing so it fits the person better.

    Like taking in a loose shirt until it hugs your body.

    The tailor will alter the jacket so it fits your shoulders.

    She altered the dress to make it a little shorter.

    UsageSay you get a dress altered to fit.

    Similartailor, adjust

  3. 3
    neuterverbUSCanadatransitive
    To neuter or spay a pet so it cannot have babies.

    The vet will alter your kitten next month.

    We altered our dog when he was six months old.

    Similarneuter, sterilize, spay

Less common meaning

  1. 4
    noun
    One of the different selves inside a person who has more than one identity.

Practice

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Origin

From Latin alter, meaning "the other," through Latin alterare "to make other" and Old French alterer.

Checked 30 Oct 2026 · 3 facts