Aha Definition

ä-hä
interjection
Used to express surprise, pleasure, or triumph.
American Heritage
Used to express triumph, surprise, pleasure, satisfaction, etc., often mixed with irony or mockery.
Webster's New World
Aha! That will work.
Wiktionary
noun
Any of a group of natural or synthetic alpha hydroxy acids, including lactic acid and glycolic acid, found in fruit, sour milk, sugar cane, etc. and used in making cleansing creams and lotions that exfoliate the skin.
Webster's New World
Initialism of alpha-hydroxy acid.
Wiktionary
abbreviation
Alpha-hydroxy acid.
American Heritage Medicine
pronoun

Initialism of American Heart Association.

Wiktionary

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