Fifths

noun

1. The person or thing in the fifth position.
2. One of five equal parts of a whole.
3. The fifth gear of an engine.
4. A quantity of liquor equal to one-fifth of a gallon, or, more commonly, 750 milliliters (that is, three quarters of a liter).
5. The musical interval between one note and another seven semitones higher (the fifth note in the major/minor scale)