A mainframe is a computer that is used for a lot of serious business. It is usually much more expensive than a regular computer, and it is not usually used by people who are just surfing the Internet.

  • They are switching to a new mainframe because the old one is starting to get old.

  • The mainframe is used for a lot of important financial calculations.

Definition of mainframes


(computer science) the part of a computer (a microprocessor chip) that does most of the data processing


c.p.u., central processing unit, central processor, cpu, processor


a large digital computer serving 100-400 users and occupying a special air-conditioned room


mainframe computer

Nearby Words

mainframes Pronunciation in a video