Dictionary definition · throb
noun
- a deep pulsating type of pain
- an instance of rapid strong pulsation (of the heart)"he felt a throbbing in his head"
verb
- pulsate or pound with abnormal force"my head is throbbing"
- expand and contract rhythmically; beat rhythmically"The baby's heart was pulsating again after the surgeon massaged it"
- tremble convulsively, as from fear or excitement
Source: Open English WordNet (CC BY 4.0).