Definition of gigantic adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//dʒaɪˈɡæntɪk//
; NAmE NAmE//dʒaɪˈɡæntɪk//
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extremely large synonym enormous, huge a gigantic house The problem was beginning to take on gigantic proportions. The bomb caused a gigantic explosion. Word Originearly 17th cent. (in the sense ‘like or suited to a giant’): from Old French, via Latin from Greek gigas, gigant- + -ic.
See the Oxford Advanced American Dictionary entry: gigantic