"Happy" is generally used as an adjective.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Adjective: He's a happy person.
Adverb: We'll go to the party happy.
Verb (irregular usage): Happy me and I'll happy you.
Noun: Happy is what I want to be.
anonymous Is happy a verb or a noun?
The noun form is happiness.