aha

US /ɑːˈhɑː/
UK /ɑːˈhɑː/
1.

à ha

used when you suddenly understand or find something:

:
Aha, now I see what you mean!
1.

à ha

abbreviation for alpha-hydroxy acid: a type of organic acid that is used in some products intended to remove dead skin cells and to make the skin look healthy, attractive, and young:

:
AHAs (acids derived from milk and fruit sugars) are added to prescription skin creams and cosmetics.