English definition of “business”
TRADE [U] › the buying and selling of goods or services: The shop closed last year, but now they're back in business. We do a lot of business with China. His company has gone out of business (= failed).
ORGANIZATION [C] › an organization that sells goods or services: My uncle runs a small decorating business.
WORK [U] › work that you do to earn money: She's in Vienna on business (= working).
a nasty/strange, etc business › an unpleasant/strange, etc situation
be sb's (own) business › to be something private that other people do not need to know: What he does in his own home is his business.
be none of sb's business › If something is none of someone's business, they do not need to know about it, although they want to, because it does not affect them.
mind your own business › used to tell someone in a rude way that you do not want them to ask about something private → See also big business → See also show business