What is the definition of ocilator?

Answer 1

An 'oscillator' is a scientific instrument that displays electronic wave-forms, or a circuit producing an alternating current or voltage.

Answer 2

An oscillator is an electronic circuit that produces a repetitive electronic signal, typically a sine wave, square wave, or sawtooth wave. Oscillators are commonly used in electronic devices such as radios, televisions, and computers to generate clock signals, audio tones, and radio frequencies.