Definition of gargantuan in English:

gargantuan

Line breaks: gar¦gan|tuan
Pronunciation: /gɑːˈgantjʊən
 
/

adjective

Enormous: a gargantuan appetite
More example sentences
  • However, for those of us for whom it also is work, it is a stamina and endurance challenge of gargantuan proportions.
  • As befits a man with a gargantuan appetite, he chose the menu himself.
  • A whole new sector with a gargantuan appetite for power was emerging.
Synonyms
enormous, extremely big, extremely large, massive, huge, colossal, vast, immense, cosmic, tremendous, gigantic, giant, monstrous, towering, mammoth, prodigious, elephantine, mountainous, mighty, monumental, epic, king-size, king-sized, titanic, Herculean, Brobdingnagian, substantial, hefty, weighty, bulky
informal whopping, whopping great, thumping, thumping great, humongous, mega, monster, jumbo, hulking, bumper
British informal whacking, whacking great, ginormous

Origin

late 16th century: from Gargantua, the name of a voracious giant in Rabelais' book of the same name (1534), + -an.

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