The occupation, work, or trade in which a person is engaged: the wholesale food business. A specific occupation or pursuit: the best designer in the business. Commercial, industrial, or professional dealings: new systems now being used in business. A commercial enterprise or establishment: bought his uncle's business. Volume or amount of commercial trade: Business had fallen off. Commercial dealings; patronage: took her business to a trustworthy salesperson. One's rightful or proper concern or interest: "The business of America is business\u201d ( Calvin Coolidge). Something involving one personally: It's none of my business. Serious work or endeavor: got right down to business. An affair or matter: "We will proceed no further in this business\u201d ( Shakespeare). An incidental action performed by an actor on the stage to fill a pause between lines or to provide interesting detail. Informal Verbal abuse; scolding: gave me the business for being late. Obsolete The condition of being busy.