kind of herb (Salvia officinalis), early 14c., from Old French sauge (13c.), from Latin salvia, from salvus "healthy" (from PIE root *sol- "whole, well-kept"). So called for its healing or preserving qualities (it was used to keep teeth clean and relieve sore gums, and boiled in water to make a drink to alleviate arthritis). In English folklore, sage, like parsley, is said to grow best where the wife is dominant. In late Old English as salvie, directly from Latin. Compare German Salbei, also from Latin.
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Definitions of salvia from WordNet
any of various plants of the genus Salvia; a cosmopolitan herb;