Pronunciation: (thi-sôr'us), [key]
—pl. -sau•rus•es, -sau•riPronunciation: (-sôr'ī). [key]
1. a dictionary of synonyms and antonyms.
2. any dictionary, encyclopedia, or other comprehensive reference book.
3. a storehouse, repository, or treasury.
a. an index to information stored in a computer, consisting of a comprehensive list of subjects concerning which information may be retrieved by using the proper key terms.
b. a dictionary of synonyms and antonyms stored in memory for use in word processing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.