som·me·lier (sŭm'əl-yā', sô'mə-lyā') n. A restaurant employee who orders and maintains the wines sold in the restaurant and usually has extensive knowledge about wine and food pairings.
[French, from Old French, officer in charge of provisions, pack-animal driver, alteration of *sommerier, from sommier, beast of burden, from Vulgar Latin *saumārius; see summer2.]