maniac.
An insane person, especially one who suffers from a mania.
Meaning & usage
An insane person, especially one who suffers from a mania.
She was driving like a maniac.
A fanatic, a person with an obsession.
He's a manga maniac.
Ellipsis of sex maniac.
Where this word comes from
Etymology tree Proto-Indo-European *men- Proto-Indo-European *-yéti Proto-Indo-European *mn̥yétorder. Proto-Hellenic *məňňómai Ancient Greek μαίνομαι (maínomai) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ῐ́ᾱ f (-ĭ́ā) Ancient Greek μᾰνῐ́ᾱ (mănĭ́ā) Proto-Indo-European *-kos Proto-Hellenic *-kos Ancient Greek -κός (-kós) Ancient Greek -ᾰκός (-ăkós) Ancient Greek μανιακός (maniakós)bor. Late Latin maniacuslbor. French maniaquebor. English maniac From mania + -ac. Borrowed from French maniaque, from Late Latin maniacus, from Ancient Greek μανιακός (maniakós), adjectival form of μανία (manía, “madness”). Compare manic.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.