Usually means: Sudden realization of a solution.
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We found 40 dictionaries that define the word AHA:

General (25 matching dictionaries)
  1. AHA, aha: Merriam-Webster
  2. AHA, aha: Oxford Learner's Dictionaries
  3. AHA, aha: American Heritage Dictionary of the English Language
  4. aha: Collins English Dictionary
  5. Aha, aha: Wordnik
  6. aha: Cambridge Advanced Learner's Dictionary
  7. AHA, aha: Wiktionary
  8. aha: Webster's New World College Dictionary, 4th Ed.
  9. aha: The Wordsmyth English Dictionary-Thesaurus
  10. aha: Infoplease Dictionary
  11. AHA, Aha, a.h.a: Dictionary.com
  12. aha: Online Etymology Dictionary
  13. aha: Cambridge Essential American English Dictionary
  14. AHA, Aha (Book of Mormon), Aha (disambiguation), Aha (streaming service), Aha (wasp), Aha: Wikipedia, the Free Encyclopedia
  15. Aha: Online Plain Text English Dictionary
  16. aha: Webster's Revised Unabridged, 1913 Edition
  17. Aha: AllWords.com Multi-Lingual Dictionary
  18. aha: Webster's 1828 Dictionary
  19. AHA: Stammtisch Beau Fleuve Acronyms
  20. aha: FreeDictionary.org
  21. AHA: TheFreeDictionary.com
  22. aha: Longman Dictionary of Contemporary English
  23. aha: Merriam-Webster

Business (1 matching dictionary)
  1. Construction Term Glossary (No longer online)

Medicine (5 matching dictionaries)
  1. AHA: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. Hair Facts (No longer online)
  4. AHA: Dictionary of Cancer Terms
  5. AHA, Aha: Medical dictionary

Miscellaneous (5 matching dictionaries)
  1. Ka-BOOM! Comicbook Words on Historical Principles (No longer online)
  2. Encyclopedia of the Orient (No longer online)
  3. AHA: Acronym Finder
  4. AHA: Three Letter Words with definitions
  5. AbbreviationZ (No longer online)

Religion (1 matching dictionary)
  1. Aha: Easton Bible

Science (1 matching dictionary)
  1. Archaeology Wordsmith (No longer online)

Slang (1 matching dictionary)
  1. AHA, Aha: Urban Dictionary

Tech (1 matching dictionary)
  1. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)

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Definitions from Wiktionary (AHA)

▸ noun:  (organic chemistry) Initialism of alpha-hydroxy acid. [(organic chemistry) Any hydroxy acid, of general formula RCH(OH)COOH, used in the cosmetic industry for their supposed property of reducing wrinkles.]
▸ noun:  (countable, property law, England and Wales) Initialism of Agricultural Holdings Act tenancy. [(property law, England and Wales) Synonym of full agricultural tenancy.]
▸ noun:  (medicine, cardiology) Initialism of American Heart Association: an American non-profit organization focusing on cardiovascular medical research, education and care.
▸ noun:  (countable, property law, England and Wales) Initialism of Agricultural Holdings Act.

Similar:
eureka, oooh, epiphany, eeee, bam, shazam, EWW, whoa, mishear, wow, more...

Opposite:
oh no, darn, drat, shoot

Phrases:
aha moment, aha moments, aha effect, aha id no, Aha Shake Heartbreak, more...

Adjectives:
big, southern, great, northern, causative, abilitative, references, idiopathic, warm, kher, hor

Colors:
    yellow,     gold,     bright green,     lime,     neon pink, more...


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Similar:
eureka, oooh, epiphany, eeee, bam, shazam, EWW, whoa, mishear, wow, more...

Opposite:
oh no, darn, drat, shoot

Phrases:
aha moment, aha moments, aha effect, aha id no, Aha Shake Heartbreak, more...

Adjectives:
big, southern, great, northern, causative, abilitative, references, idiopathic, warm, kher, hor

Colors:
    yellow,     gold,     bright green,     lime,     neon pink, more...



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