What is the meaning of Sommelier?

The member of staff at a restaurant who keeps the wine cellar and advises the guests on a choice of wines; a wine steward / stewardess, a wine waiter / waitress / server.

To act as a sommelier.

sommelier, wine steward (a person who is in charge of the wine cellar in a restaurant)

the person in charge of bread, linens, crockery, and liquor; the chief of table setting

the person in charge of the wine convoy, its beasts of burden, and its protection

sommelier, wine steward (member of staff at a restaurant who keeps the wine cellar and advises the guests on a choice of wines)

sommelier (wine steward)

sommelier

a sommelier

Source: wiktionary.org