1. a. : prepare, steel. brace yourself for the shock. : invigorate, freshen. I took the shower and it braced me up a bit. Raymond Chandler. c. : to prepare for use by making taut. brace a drum. 2. a. : to furnish or support with a brace (see brace entry 2 sense 1) heavily braced against the wind. b. : to make stronger : reinforce. More @Wikipedia
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