yay

/jeɪ/

interjection

Meaning

An expression of happiness.
"Yay! I have finally finished my work!"

Synonyms

hooray

adverb

Meaning

Yes.
Thus, so (now often accompanied by a hand gesture).
"The pony was yea high."

Synonyms

aye,

yeah,

yep,

yes,

yigh,

yup