Real Dictionary

butter
variable noun: Butter is a soft yellow substance made from cream. You spread it on bread or use it in cooking.

butter in American English
the solid, yellowish, edible fat that results from churning cream or whole milk, used as a spread, in cooking, etc.
noun: the fatty portion of milk, separating as a soft whitish or yellowish solid when milk or cream is agitated or churned
transitive verb: to put butter on or in; spread or grease with butter

butter in British English
noun: an edible fatty whitish-yellow solid made from cream by churning, for cooking and table use

butter in Hospitality
noun: Butter is a soft yellow substance made from cream. You spread it on bread or use it in cooking.