—n. 1. a small metal projectile, part of a cartridge, for firing from small arms. See diag. under cartridge. 2. a cartridge.
3. a small ball.
4. Print.a heavy dot for marking paragraphs or otherwise calling attention to or itemizing particular sections of text, esp. in display advertising.
5. Cards.an ace.
6. bite the bullet, to force oneself to perform a painful, difficult task or to endure an unpleasant situation: We'll just have to bite the bullet and pay higher taxes.