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Definitions

dinosaur

[dahy-nuh-sawr] / ˈdaɪ nəˌsɔr /
ADJECTIVE
obsolete
Synonyms
STRONGEST
antiquated archaic out-of-date outmoded
WEAK
anachronistic ancient antediluvian antique bygone dated dead dead and gone discarded disused done for dusty extinct fossil gone had it has-been horse and buggy kaput moldy moth-eaten old old-fashioned old-hat old-school out out-of-fashion outworn passé stale superannuated superseded timeworn unfashionable
Antonyms
STRONGEST
current modern new
WEAK
contemporary in vogue present up-to-date
ADJECTIVE
outmoded
Synonyms
STRONGEST
antiquated archaic obsolete out-of-date
STRONG
antique bent dated fossilized out outworn superannuated superseded tired
WEAK
anachronistic antediluvian behind the times bygone dead disused démodé extinct has-been horse and buggy moldy moth-eaten musty obsolescent old-hat old-time olden out of style passé unfashionable unstylish unusable vintage
Antonyms
STRONGEST
current modern new present
STRONG
fresh
WEAK
newfangled popular up-to-date

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The dinosaur had large cheekbones, a broad braincase, and likely a short, deep snout.

From Science Daily • Apr. 15, 2026

After years of analysis, the team determined that this dinosaur belonged to Herrerasauria, one of the earliest groups of carnivorous dinosaurs.

From Science Daily • Apr. 15, 2026

This approach had not previously been applied to dinosaur fossils and could open up new ways to study fragmentary remains.

From Science Daily • Apr. 15, 2026

“Anne Hathaway being in it was what initially interested me . . . and then the reveal of the dinosaur aspect got my full attention.”

From Salon • Apr. 12, 2026

I turn to see what she sees—a serpent the size of a dinosaur.

From "Kwame Crashes the Underworld" by Craig Kofi Farmer

Vocabulary lists containing dinosaur

Tyrannosaurus Lex(icon)

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Paleontology: Dinosaurs - Introductory

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Paleontology: Dinosaurs - Middle School and High School

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