Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of various extinct terrestrial reptiles of the orders Saurischia and Ornithischia that existed during the Mesozoic Era, including both carnivores and herbivores and often reaching a gigantic size.
  • noun Any of various other large extinct reptiles, such as an ichthyosaur.
  • noun A relic of the past.
  • noun One that is hopelessly outmoded or unwieldy.

from The Century Dictionary.

  • noun One of the Dinosauria. Also spelled deinosaur.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Paleon.) One of the Dinosauria.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any of various extinct reptiles belonging to the Dinosauria, existing between about 230 million and 65 million years ago.
  • noun figuratively, colloquial A person or organisation which is very old or has very old-fashioned views or is not willing to change and adapt.
  • noun figuratively, colloquial Anything that is no longer in common use or practice.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any of numerous extinct terrestrial reptiles of the Mesozoic era

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin Dīnosauria, group name, from Dīnosaurus, former genus name : Greek deinos, monstrous + Greek sauros, lizard.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek δεινός (deinos, "terrible, awesome, mighty, fearfully great") + σαῦρος (sauros, "lizard, reptile").

Examples

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