"Of the nature of a colossus; colossal; huge", Mid 17th cent.; earliest use found in John Evelyn (1620–1706), diarist and writer. From classical Latin colossēus much larger than life, colossal (from colossus + -ēus; compare Hellenistic Greek κολοσσιαῖος) + -an.[colossean etymology, colossean origin, 英语词源]