—used to express surprise, triumph, or derision
"Aha! we've found the thief, then!" said the conductor.—Horatio Alger
The Professor smiled, and looked quite jubilant. He rubbed his hands together, and said, "Aha! I thought I had diagnosed the case. My treatment is working."—Robert Louis Stevenson
"Aha! Doctor!" said the Colonel at last, with a doltish sneer, "you bear your years well."—Nathaniel Hawthorne
see also aha moment
AHA
2 of 2abbreviation or noun
plural AHAs
: alpha hydroxy acid
The product also includes 6 percent alpha hydroxy acid (AHA), an exfoliator, to enhance the growth of new healthy skin.—Dermatology Times
AHAs loosen the bonding between the outermost skin cells, encouraging them to slough off and reveal the fresh new skin beneath.—Essence
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Merriam-Webster unabridged
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