A wave generator is a device that produces waves of energy, usually in the form of sound or light. The term 'wave generator' can also refer to a machine that creates artificial waves in water for recreational purposes. The crossword solution for the term 'wave generator' is PERM, which stands for Permanent Magnet Motor. This type of motor uses permanent magnets to generate a rotating magnetic field, which in turn creates an alternating current. This alternating current is then used to create a wave of energy.