oscillator noun3 •A tuned electronic circuit used to generate a continuous output waveform. •A pattern that returns to its original state, in the same orientation and position, after a finite number of generations.He has turned up a number of new oscillators of periods 2,3,4,5,6, & 8. — 1989 •An instrument for measuring rigidity by the torsional oscillations of a weighted wire. formsoscillators