Definition of "bracket" []

• A simple rigid structure in the shape of an L, one arm of which is fixed to a vertical surface, the other projecting horizontally to support a shelf or other weight. (noun)
• A small shelf or shelves supported by such structures. (noun)
• Architecture A decorative or weight-bearing structural unit, two sides of which form a right angle with one arm flush against a wall and the other flush beneath a projecting surface, such as eaves or a bay window. (noun)
• A wall-anchored fixture for gas or electricity. (noun)
• A square bracket. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Expanded capsules and in-depth team information will also be available after the bracket is announced."
• "The other bracket is all-Mexican: Monterrey vs. Toluca and Santos Laguna vs. Cruz Azul."
• "What they are saying in the McCain campaign is that they think that, if he goes on to the Senate floor, the Democrats will what they call bracket him, meaning having a coordinated attack against him."