noun
Usage: usually capitalized O
Etymology: after G. S. Ohm
1. : a law in electricity: the strength or intensity of an unvarying electrical current is directly proportional to the electromotive force and inversely proportional to the resistance of the circuit
2. : a statement in acoustics: the human ear in perceiving a complex sound receives not a sensation of a single sound but sensations of the separate components of the complex wave causing the sound