The definition of a colossus is someone or something of great size or importance or ability.
(noun)See colossus in Webster's New World College Dictionary
noun pl. colossi or colossuses
Origin: ME < L < Gr kolossos
See colossus in American Heritage Dictionary 4
noun pl. co·los·si (-lŏsˈīˌ) or co·los·sus·es
Origin:
Origin: Latin
Origin: , from Greek kolossos
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