thesaurus - Word Definition / Meaning

Thesaurus \The*sau"rus\, n.; pl.
{Thesauri}. [L. See {Treasure}.]
A treasury or storehouse; hence, a repository, especially of knowledge; -- often applied to a comprehensive work, like a dictionary or cyclopedia.
[1913 Webster].

thesaurus n : a book containing a classified list of synonyms [syn: {synonym finder}]
[also: {thesauri} (pl)].