Definition of “throb” - Learner’s Dictionary

throb

verb [ I ] uk us /θrɒb/ (present participle throbbing, past tense and past participle throbbed)
PART OF THE BODY

If a part of your body throbs, you feel pain in it in a series of regular beats:

My head was throbbing.
SOUND OR MOVEMENT

to make a strong, regular sound or movement:

The whole house throbbed with the music.
throb noun [ C ]

the throb of the engine

(Definition of “throb” from the Cambridge Learner's Dictionary © Cambridge University Press)