dinosaur

noun
di·​no·​saur | \ ˈdī-nə-ˌsȯr How to pronounce dinosaur (audio) \

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 (such as ichthyosaurs) other than the true dinosaurs
3 : one that is impractically large, out-of-date, or obsolete The factory is now a rusting dinosaur.

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Other Words from dinosaur

dinosaurian \ ˌdī-​nə-​ˈsȯr-​ē-​ən How to pronounce dinosaurian (audio) \ adjective
dinosauric \ ˌdī-​nə-​ˈsȯr-​ik How to pronounce dinosauric (audio) \ adjective

Synonyms for dinosaur

Synonyms

has-been, relic

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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.

Recent Examples on the Web

Researchers named the dinosaur Kamuysaurus japonicus. Fox News, "New duck-billed dinosaur, Kamuysaurus japonicus, discovered by scientists," 6 Sep. 2019 The carnivorous dinosaur had something akin to an air conditioner in its skull, according to a new study published Wednesday in the The Anatomical Record. Ashley Strickland, CNN, "Tyrannosaurus rex had a built-in air conditioner, study says," 5 Sep. 2019 But really, one thing towers above all else to catch your kids’ attention: the pumpkin-eating dinosaur. Web Behrens, chicagotribune.com, "Labor Day is over, time to start planning for fall. Here’s a list of awesome family activities around Chicago.," 4 Sep. 2019 In extinct dinosaurs, the structures may have even been proportionally bigger than those seen in living animals, Holliday notes. John Pickrell, National Geographic, "New discovery shows how T. rex kept its brain cool," 4 Sep. 2019 One portion of the show featured a series of loopy dinosaur-like heads. Christina Binkley, The New Yorker, "Sterling Ruby’s Mixed Media," 2 Sep. 2019 Its species is believed to date back to the Triassic period, when dinosaurs first walked the earth, more than 180 million years ago. CBS News, "Sequoia National Park, home of the world's largest tree, gets a technological update," 27 Aug. 2019 Had the rings even formed when the Chicxulub asteroid wiped out the dinosaurs? Vahe Peroomian, The Conversation, "A brief astronomical history of Saturn’s amazing rings," 14 Aug. 2019 No, dinosaurs haven't reanimated and come back to life. Michelle Iracheta, Houston Chronicle, "Take a tour of Dinosaur Park Texas and take your picture with a life size T-Rex," 23 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dinosaur.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of dinosaur

1841, in the meaning defined at sense 1

History and Etymology for dinosaur

New Latin Dinosaurus, genus name, from Greek deinos terrifying + sauros lizard — more at dire

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Statistics for dinosaur

Last Updated

12 Sep 2019

Look-up Popularity

Time Traveler for dinosaur

The first known use of dinosaur was in 1841

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More Definitions for dinosaur

dinosaur

noun

English Language Learners Definition of dinosaur

: 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

noun
di·​no·​saur | \ ˈdī-nə-ˌsȯr How to pronounce dinosaur (audio) \

Kids Definition of dinosaur

: any of a group of extinct often very large mostly land-dwelling reptiles that lived millions of years ago

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Comments on dinosaur

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