noun.
One of the two vectors in the standard notation for describing quantum states in quantum mechanics, the other being the ket.
noun.
a brassiere
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
an undergarment worn by women to support their breasts
Word Usage
"Structured simply the campaign for the title bra separates women into two categories: Marilyn and Jackie the question recurs throughout the episode in careful variation."