Aha vs. Ah: What's the Difference?

Aha and Ah Definitions
Aha
Used to express surprise, pleasure, or triumph.
Ah
Used to express various emotions, such as satisfaction, surprise, delight, dislike, or pain.
Aha
An exclamation of understanding, realization, invention, or recognition.
Aha! That will work.
Ah
An expression of relief, relaxation, comfort, confusion, understanding, wonder, awe, etc. according to uttered inflection.
Ah, I understand now.
Ah! It's good to be back home!
Ah, the flowers of spring.
Aha
An exclamation of surprise, exaltation, or contempt.
Aha! Now I've got you!
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Ah
A syllable used to fill space, particularly in music.
Aha
An exclamation expressing, by different intonations, triumph, mixed with derision or irony, or simple surprise.
Ah
An instance of the interjection ah.
The crowd's oohs and ahs at the fireworks
Aha
A sunk fence. See Ha-ha.
Ah
To give a cry of "ah".
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Ah
Pronunciation spelling of I#Pronoun
Ah
An exclamation, expressive of surprise, pity, complaint, entreaty, contempt, threatening, delight, triumph, etc., according to the manner of utterance.