Definition of mastodon
1 : any of various extinct mammals (genus Mammut synonym Mastodon) of the elephant family existing from the Miocene through the Pleistocene that are distinguished from the related mammoths chiefly by molar teeth with cone-shaped cusps
2 : one that is unusually large
mastodonicplay \ˌmas-tə-ˈdä-nik\ adjective
mastodontplay \ˈmas-tə-ˌdänt\ adjective or noun
Examples of mastodon in a Sentence
mom-and-pop stores just can't compete with these mastodons of retailing
Recent Examples of mastodon from the Web
Bigger than dinosaurs, bigger than mastodons, a blue whale can reach up to almost 100 feet long and have been weighed at as much as 191 tons.
The first evidence dates back to the beginnings of science itself, when amateur scientists stumbled across the bones of massive, long-extinct mammals like the mastodon, giant ground sloth and saber-toothed tiger.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mastodon'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of mastodon
New Latin mastodont-, mastodon, from Greek mastos + odont-, odōn, odous tooth — more at tooth
First Known Use: 1811
MASTODON Defined for English Language Learners
Definition of mastodon for English Language Learners
: a type of animal that was related to the mammoth and that lived in ancient times
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