Pronunciation: (si-non'u-mē), [key]
—pl. -mies for 3, 4.
1. the quality of being synonymous; equivalence in meaning.
2. the study of synonyms.
3. a set, list, or system of synonyms.
4. Biol.a list of the scientific names, with explanatory matter and location of type or types, for a particular taxonomic group.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.