THE ONE dinosaur who was so "the shit", that he needed no prefix.
Daaaaym, THEsaurus is so the shit!

Rar.
by Craptoidilus February 24, 2008
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A thesaurus is a reference work that lists words grouped together according to similarity of meaning (containing synonyms and sometimes antonyms), in contrast to a dictionary, which contains definitions and pronunciations.

The largest thesaurus in the world is the Historical Thesaurus of the Oxford English Dictionary, which contains more than 920,000 entries.
Girl at library: Excuse me, where is the thesaurus found here?

Librarian: It's at the "reference" or the "non-fiction" section.

Girl: OK, thank you~
by Final Fantasy DUNDUNDUN October 6, 2011
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The only dinosaur that could read.
The thesaurus read a bed time story to his little dinos.
by Soccer10Kid October 26, 2010
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Another book much like a dictionary, but is used to find words that mean the same things as other, in other words used to find words synonyms.
"I used a thesaurus? to look up fag, and found the name Jonas."
by Fabio Sisparro November 28, 2006
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A big book that college kids use to sound smart when they have nothing relevant to say.
"Hey, what's another word for marginalize?"
"I don't know... look it up in the thesaurus!"
by Wallbridge June 28, 2006
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A little-known, but extremely intelligent dinosaur that survived the extinction of the dinosaurs by hiding in Hogwarts with the dragons.
Thesauruses are the ninjas of the book world.
by Someone Average March 23, 2012
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steve: thesaurus
timwu: Isn't that a dinosaur?
steve: No u fuckin idiot!( and leaves)
by Tim Wu January 18, 2008
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