/ gɑːˈgæntʃuən; NAmE gɑːrˈg-/ adjective
[ usually before noun ] extremely large
SYN enormous :
a gargantuan appetite / meal
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WORD ORIGIN
late 16th cent.: from Gargantua , the name of a voracious giant in Rabelais' book of the same name (1534), + -an .