| Big Brother 1. a government or a large organization which tries to control every part of people's lives and to know everything about them. Many people are concerned about Big Brother having computer files on them to which they do not have access. (always before noun) 2. Big Brother - a government or a large organization which tries to control every part of people's lives and to know everything about them. Employees have complained because of the 'Big Brother' approach of the new security measures. |