bite (as a noun)

2. N-COUNT : oft N of n

A bite of something, especially food, is the action of biting it.     

• He took another bite of apple.     
• You cannot eat a bun in one bite. 

3. N-SING : a N, usu N to-inf

If you have a bite to eat, you have a small meal or a snack.[ INFORMAL ]     

• It was time to go home for a little rest and a bite to eat.
  

5. N-COUNT : oft n N

A bite is an injury or a mark on your body where an animal, snake, or small insect has bitten you.

• Any dog bite, no matter how small, needs immediate medical attention.
  

8. N-UNCOUNT

If you say that a food or drink has bite, you like it because it has a strong or sharp taste.   

• the addition of tartaric acid to give the wine some bite.
  

9. N-SING : a N

If the air or the wind has a bite, it feels very cold.    

• There was a bite in the air, a smell perhaps of snow.
  

.... Cobuild