As a noun: the thick white or pale yellow fatty liquids that rises to the top of a glass of milk that is left standing and can be used as an accompaniment to desserts or eaten as an ingredient. Example: strawberries and cream or a cream sauce.
As a verb: (1) to work (butter, typically with sugar) to form a smooth, soft paste. Example: In a bowl with an electric mixer cream together butter and granulated sugar until light and fluffy. (2) to mash a cooked vegetable and mix with milk or cream. Example: to cream spinach.