pʌlˈseɪt ˈpʌl.seɪt θɹɒb produce or modulate (as electromagnetic waves) in the form of short bursts or pulses or cause an apparatus to produce pulses pulse waves a transmitter pulsed by an electronic tube expand and contract rhythmically; beat rhythmically The baby's heart was pulsating again after the surgeon massaged it move with or as if with a regular alternating motion the city pulsated with music and excitement