1. one of the hard white objects in the mouth used for biting and chewing food
2. a pointed part that sticks out from something, especially from a gear, saw, or comb

Examples

• She brushes her teeth twice a day.
• The dentist found a cavity in my back tooth.
• He lost a tooth in the accident.
• The baby is getting her first tooth.
• The saw blade has very sharp teeth.
• One tooth broke off the plastic comb.
• The gear teeth mesh together perfectly.