If someone refers to a brave new world, they are talking about a situation or system that has recently been created and that people think will be successful and fair. the brave new world of internet banking. A world or realm of radically transformed existence, especially one in which technological progress has both positive and negative results. a novel written in 1932 by the British writer Aldous Huxley, which imagines an advanced society of the future in which many people seem to have easy and pleasant lives, but in fact no-one has any freedom. This phrase, which was first used in Shakespeare's play The Tempest, is now used to describe any society like this