The word brace refers to many different things:

• Curly brackets: the { and } symbols, often used to define sets.
• Brace: a pair, two.
• Brace : a reinforcement or stabilizer in building.
• Brace or Bracer : a wrist or forearm protector.
• Brace : a slide for adjusting tension of a drum.
• Brace : a support for a scenery flat in a theatre.
• Braces : (in American English - suspenders), a support for trousers, usually elasticated.
• Brace can be an instruction to ready yourself for something, as in brace for impact before a crash.
• Brace : in cricket, the act of taking two wickets with two successive deliveries of the ball.
• Brace : a hand tool used to drill holes.
• Brace: a metal device used to progressively straighten teeth.
• Brace : also Orthosis or Orthotic a device used to immobilise a joint or body segment, restrict movement in a given direction, assist movement, reduce weight-bearing forces or correct the shape of the body (adapted from Rehabilitation Medicine, ISBN: 0-397-50764-X).