birthday

birth-day · noun

imported

Definitions

noun

  1. 1.

    The annual anniversary of the day on which a person was born.

  2. 2.

    The anniversary of the founding or creation of something.

Forms

plural: birthdays

Phrases & expressions

  • •
    happy birthday — A greeting used to wish someone well on their birthday.
  • •
    birthday party — A celebration held on or around someone's birthday.
  • •
    birthday cake — A cake served at a birthday celebration, often with candles.
  • •
    birthday suit — **[humorous]** Nakedness (being nude).
  • •
    birthday card — A greeting card given on someone's birthday.

Related words

See also: anniversary, birth, celebration
Synonyms: anniversary

Etymology

From Middle English, compound of birth + day.