Merriam-Webster's Collegiate® Dictionary, 11th Edition
CUP
I. noun see: hive Date: before 12th century an open usually bowl-shaped drinking vessel,
2. a drinking vessel and its contents, the consecrated wine of the Communion, something that falls to one's lot, an ornamental cup offered as a prize (as in a championship), something resembling a cup: as, a cup-shaped plant organ, an athletic supporter reinforced usually with plastic to provide extra protection to the wearer, either of two parts of a brassiere that are shaped like and fit over the breasts, the metal case inside a hole in golf, a usually iced beverage resembling punch but served from a pitcher rather than a bowl, a half pint ; eight fluid ounces, a food served in a cup-shaped usually footed vessel , the symbol ∪ indicating the union of two sets, cuplike adjective
II. transitive verb (cupped; cupping)
Date: 14th century
to treat by cupping,
2. to curve into the shape of a cup , to place in or as if in a cup