Definition of mammoth in English:

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Pronunciation: /ˈmaməTH/


A large extinct elephant of the Pleistocene epoch, typically hairy with a sloping back and long curved tusks.
  • Genus Mammuthus, family Elephantidae: several species.
Example sentences
  • Woolly mammoths, which are now extinct, lived from the Pleistocene to the early Holocene period from about 120,000 to 4,000 years ago.
  • The back cover claims it presents the wonderful story of the elephant, from the extinct mammoths of the Ice Age to their present day battle for survival.
  • In this scenario, humans moved rapidly through the continent, slaughtering mammoths, mastodons and other large prey as they went.


Huge: a mammoth corporation
More example sentences
  • Like any mammoth task, it can be difficult to get started.
  • Otherwise Zambia needs a pat on the back for embarking on this mammoth task of fighting corruption.
  • As long as it's not a multicolored, mammoth hat with a humongous pom-pom attached to it.
huge, enormous, gigantic, giant, colossal, massive, vast, immense, mighty, stupendous, monumental, Herculean, epic, prodigious, mountainous, monstrous, titanic, towering, elephantine, king-size(d), economy-size(d), gargantuan, Brobdingnagian
informal mega, monster, whopping, honking, humongous, bumper, jumbo, astronomical, ginormous


Early 18th century: from Russian mamo(n)t, probably of Siberian origin.

  • In Siberia people used to dig up fossil remains and frozen carcasses of a large elephant-like hairy mammal with long curved tusks. They called this in Russian the mamont, which probably came from a Siberian word meaning ‘earth horn’. In the early 18th century English acquired this as mammoth. The word began to refer to anything of a huge size in the early 19th century. See also colossal

For editors and proofreaders

Syllabification: mam·moth

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