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Definition of maniac
maniac
/ˈmeɪ.ni.æk/
ma · ni · ac
Adverb:maniacally
•Plural:maniacs
•Adjective:maniacal
maniac Lexical Profile
CEFR
B2
Grade
7
Tier
2
Usage
Top 10k
Syllables
3
maniac Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A person who exhibits wild, reckless, or dangerously irrational behavior.
Example
"Some maniac was weaving through heavy highway traffic at ninety miles an hour."
2
A person who has an extreme or obsessive enthusiasm for a particular activity or subject.
Example
"He is an absolute fitness maniac who wakes up at four every morning to train for marathons."
Synonyms
View all synonyms for maniac• adjective
1
Characterized by wild, frantic, or dangerously irrational behavior; maniacal.
Example
"The driver sped through the crowded intersection with maniac recklessness."
Synonyms
View all synonyms for maniac Antonyms
View all antonyms for maniac• Rhymes for maniac
Word Origin & Etymology
Borrowed in the late 16th century from Late Latin maniacus ('affected with mania'), which derived from Ancient Greek maniakos ('mad, frantic'), from mania ('madness, frenzy').
Cite this Entry
Wordmom. (2026). Definition of Maniac. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/maniac