Properly a servant in charge of the wine (Genesis 40:1-13; 41:9). The Hebrew word, mashkeh, thus translated is rendered also (plural) "cup-bearers" (1 Kings 10:5; 2 Chronicles 9:4). Nehemiah (1:11) was cup-bearer to king Artaxerxes. It was a position of great responsibility and honour in royal households.

Noah Webster's New International Dictionary of the English Language

(n.) An officer in a king's or a nobleman's household, whose principal business it is to take charge of the liquors, plate, etc.; the head servant in a large house.