1. phrasal verb
If you bite back a feeling or something that you were going to say, you stop yourself from expressing it. [literary]
[VP n (not pron)] ⇒ Susan bit back the words she would like to have said.
[V n P] ⇒ A scream rose to her lips again. She had to bite it back.
2. phrasal verb → bite If a person or a group of people who have been defeated, criticized, or insulted bite back, they respond strongly or angrily. [journalism]
[VP] ⇒ He is quickly on the attack, biting back at the questioner until the original question
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers