The anniversary of the day on which someone is born. / The anniversary of the day on which something is created.

(intransitive, informal) To celebrate one's birthday.

plural of birthday

Third-person singular simple present indicative form of birthday

present participle of birthday

simple past tense and past participle of birthday

A woman or girl whose birthday it is.

A man or boy whose birthday it is.

A greeting card given to someone to celebrate his or her birthday.

A cake, often iced and decorated, made to celebrate a person's birthday.