Meanings
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1
noun
in fantasy literature and games, a member of a race of aggressive, often monstrous humanoid creatures
The novel's orc served a dark lord and raided the mountain villages.
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2
noun
archaic: a large ferocious sea creature, especially a killer whale
Older natural histories sometimes called the killer whale an orc.
Thesaurus
Etymology
Two histories meet in this spelling. The archaic sea animal came through Middle French orque from Latin orca, whale, and is a doublet of orca. The fantasy monster probably comes through Italian orco and Old English orc, associated with Latin Orcus, the underworld; J. R. R. Tolkien revived and popularized that sense.