Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “dinosaur”

dinosaur

noun [C] uk   /ˈdaɪ.nə.sɔːr/ us    /-sɔːr/
A2 a type of reptile which stopped existing about 65,000,000 years ago. There were many different types of dinosaur, some of which were extremely large.Prehistory disapproving an old-fashioned person or thing that people no longer consider to be useful: This typewriter's a bit of a dinosaur, isn't it?People who are boring and old-fashioned
(Definition of dinosaur from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of dinosaur?
Browse related topics

You are looking at an entry to do with Prehistory, but you might be interested in these topics from the History topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “dinosaur” in other dictionaries

Word of the Day

hoppy

like hops (= dried fruit used to make beer)

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More