Meaning of mastodon

mas•to•don

Pronunciation: (mas'tu-don"), [key]
— n.
  1. a massive, elephantlike mammal of the genus Mammut (Mastodon), that flourished worldwide from the Miocene through the Pleistocene epochs and, in North America, into recent times, having long, curved upper tusks and, in the male, short lower tusks.
  2. a person of immense size, power, influence, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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