verb. ['ˈθrɑːb'] expand and contract rhythmically; beat rhythmically.
verb. ['ˈθrɑːb'] pulsate or pound with abnormal force.
verb. ['ˈθrɑːb'] tremble convulsively, as from fear or excitement.
noun. ['ˈθrɑːb'] an instance of rapid strong pulsation (of the heart).
noun. ['ˈθrɑːb'] a deep pulsating type of pain.