As an exclamation of elation or great joy. Obsolete. rare.

Used to express various emotions or reactions, such as surprise, grief, or (now usually) exuberant excitement or delight. Also used to attract…

Used interjectionally, as an expression of joy.

Used as a devout ejaculation (short for Glory be to God) in the worship of various religious sects. Hence colloquial as a mere exclamation expressive…

An exclamation expressing delight.

An exclamation of joy, exhilaration, astonishment, etc. Occasionally as n., a high-pitched sound resembling this.

= hot diggety dog, int.

int. Usually preceded by hot and followed by dog or another monosyllable: = hot diggety, int.

An exclamation of delight or excitement: Splendid! Excellent! Hurrah!

An exclamation of enthusiasm or exuberance; ‘yahoo!’.

Expressing delight, excitement, elation, etc. Now often ironic.

Expressing astonishment, enthusiasm, or exuberance; ‘yahoo!’ ‘wow!’ Now frequently humorous.

An exclamation of triumph, approval, or encouragement.

An exclamation of excitement, exultation, or delight. Cf. yo-ho, int. n., yoo-hoo, int.

An exclamation expressing delight or exhilaration.