[noun] [C] - a large reptile which stopped existing about 60 000 000 years ago. There were many different types of dinosaur, some of which were extremely large.The brontosaurus was one of the largest of all dinosaurs.(figurative) This typewriter's a bit of a dinosaur (= very old-fashioned), isn't it?
DINOSAUR
Meaning of DINOSAUR in English
Cambridge English vocab. Кембриджский английский словарь. 2012