- A dinosaur is defined as any of the large, extinct reptiles that roamed Earth during the Paleozoic and Mesozoic eras.
An example of a dinosaur is the Brontosaurus.
- The definition of a dinosaur is someone who resists change or is old-fashioned.
An example of a dinosaur is the person in the office who still sends messages by fax.
A statue of a dinosaur or dino.
- any of various extinct, mostly land-dwelling, four-limbed saurischian or ornithischian reptiles of the Mesozoic Era, including some c. 30 m (98.4 ft) long: the flesh-eaters usually walked on their hind limbs, the plant-eaters on all fours
- loosely any large, extinct reptile of the Paleozoic or Mesozoic eras
- someone or something thought of as being old-fashioned, outmoded, resistant to change, etc.
Origin of dinosaurdino- + -saur
- a. 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.b. Any of various other large extinct reptiles, such as an ichthyosaur.
- A relic of the past: “living dinosaurs of the world of vegetation” (John Olmsted).
- One that is hopelessly outmoded or unwieldy: “The old, big-city teaching hospital is a dinosaur” (Peggy Breault).
Origin of dinosaurNew Latin Dīnosauria, group name, from Dīnosaurus, former genus name : Greek deinos, monstrous + Greek sauros, lizard.
- Any of various extinct reptiles belonging to the Dinosauria, existing between about 230 million and 65 million years ago. [from c. 1840]
- (figuratively, colloquial) A person or organisation which is very old or has very old-fashioned views or is not willing to change and adapt.
- (figuratively, colloquial) Anything that is no longer in common use or practice.
From Ancient Greek δεινός (deinos, “terrible, awesome, mighty, fearfully great”) + σαῦρος (sauros, “lizard, reptile”).