The term bite can refer to several different meanings depending on its context.
1) In a general sense, it could refer to taking or holding something in one's mouth, such as when someone says they are going to take a 'bite' of food.
2) It could also refer to the act of biting down with force, for example when someone is described as having a "sharp bite" meaning that their teeth come together with great pressure.
3) In some contexts it can mean an instance or portion of something, such as in reference to taking small portions of food at a time - "I'll just take one more bite."
4) Finally, the term could also refer to a puncture wound inflicted by an animal, typically referring to dog bites.