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Adjective gigantic has 1 sense
gigantic, mammoth - so exceedingly large or extensive as to suggest a giant or mammoth; "a gigantic redwood"; "gigantic disappointment"; "a mammoth ship"; "a mammoth multinational corporation"Antonyms:  small, little (indirect, via large, big)
 Antonyms:  small, little (indirect, via large, big)
 
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