1. (n.) A short, stiff, coarse hair, used in brushes.

2. (n.) A stiff, sharp, roundish hair.

3. (v. t.) To erect the bristles of; to cause to stand up, as the bristles of an angry hog; -- sometimes with up.

4. (v. t.) To fix a bristle to; as, to bristle a thread.

5. (v. i.) To rise or stand erect, like bristles.

6. (v. i.) To appear as if covered with bristles; to have standing, thick and erect, like bristles.

7. (v. i.) To show defiance or indignation.

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