noun, verb, braced, brac⋅ing.| 1. | something that holds parts together or in place, as a clasp or clamp. |
| 2. | anything that imparts rigidity or steadiness. |
| 3. | Also called bitbrace, bitstock. Machinery. a device for holding and turning a bit for boring or drilling. |
| 4. | Building Trades. a piece of timber, metal, etc., for supporting or positioning another piece or portion of a framework. |
| 5. | Nautical. (on a square-rigged ship) a rope by which a yard is swung about and secured horizontally. |
| 6. | Music. leather loops sliding upon the tightening cords of a drum to change their tension and the drum's pitch. |
| 7. | Often, braces. Dentistry. a round or flat metal wire placed against the surfaces of the teeth for straightening irregularly arranged teeth. |
| 8. | Medicine/Medical. an appliance for supporting a weak joint or joints. |
| 9. | braces, Chiefly British. suspender (def. 1). |
| 10. | a pair; couple: a brace of grouse. |
| 11. | Printing.
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| 12. | Music. connected staves. |
| 13. | a protective band covering the wrist or lower part of the arm, esp. a bracer. |
| 14. | Military. a position of attention with exaggeratedly stiff posture. |
| 15. | to furnish, fasten, or strengthen with or as if with a brace. |
| 16. | to fix firmly; make steady; secure against pressure or impact: He braces himself when the ship rolls. Brace yourself for some bad news. |
| 17. | to make tight; increase the tension of. |
| 18. | to act as a stimulant to. |
| 19. | Nautical. to swing or turn around (the yards of a ship) by means of the braces. |
| 20. | Military. to order (a subordinate) to assume and maintain a brace. |
| 21. | Military. to assume a brace. |
| 22. | brace in, Nautical. to brace (the yards of a square-rigged vessel) more nearly athwartships, as for running free. |
| 23. | brace up, Informal. to summon up one's courage; become resolute: She choked back her tears and braced up. |

brace (brās)
n.
An orthopedic appliance that supports or holds a movable part of the body in correct position while allowing motion of the part.
Often braces A dental appliance, constructed of bands and wires that is fixed to the teeth to correct irregular alignment.
brace up
Also, brace oneself. Summon up one's courage or resolve, as in Brace up, we don't have much farther to go, or Squaring his shoulders, he braced himself for the next wave. This idiom uses brace in the sense of "to bolster" or "to strengthen." The first term dates from the early 1700s, the variant from about 1500.