Definition of dinosaur
1 : any of a group (Dinosauria) of extinct often very large chiefly terrestrial carnivorous or herbivorous reptiles of the Mesozoic era
2 : any of various large extinct reptiles (as ichthyosaurs) other than the true dinosaurs
3 : one that is impractically large, out-of-date, or obsolete
dinosaurianplay \ˌdī-nə-ˈsȯr-ē-ən\ adjective
dinosauricplay \-ˈsȯr-ik\ adjective
Examples of dinosaur in a sentence
The old factory is now a rusting dinosaur.
The character she plays is a dinosaur—a former beauty queen who is living in the past.
Origin and Etymology of dinosaur
New Latin Dinosaurus, genus name, from Greek deinos terrifying + sauros lizard — more at dire
First Known Use: 1841
DINOSAUR Defined for English Language Learners
Definition of dinosaur for English Language Learners
: one of many reptiles that lived on Earth millions of years ago
: someone or something that is no longer useful or current : an obsolete or out-of-date person or thing
DINOSAUR Defined for Kids
Definition of dinosaur for Students
: any of a group of extinct often very large mostly land-dwelling reptiles that lived millions of years ago
Seen and Heard
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