English Dictionary

mean business

verb

(idiomatic, used to convey serious intent) To be serious, especially where achieving a specific end against opposition is concerned.

They really mean business when it comes to customer satisfaction.

意味（1）

(idiomatic, used to convey serious intent) To be serious, especially where achieving a specific end against opposition is concerned.

Say in a week from now, I will undertake to deliver this most marvellous masterpiece, if 'Look here, 'Tony, I mean business, if you don't.