FIFTH

noun (plural ~s) Etymology: Middle English fifte, ~e, from Old English fīfta, from fīf five Date: before 12th century see: number 2. the musical interval embracing five diatonic degrees, a tone at this interval, the harmonic combination of two tones at this interval, a unit of measure for liquor equal to one ~ of a United States gallon (0.757 liter), the Fifth Amendment of the United States Constitution, ~ adjective or adverb ~ly adverb