- next after the fourteenth; being the ordinal number for 15.
- being one of 15 equal parts.
- a fifteenth part, especially of one (1/15).
- the fifteenth member of a series.
- the interval of two octaves.
- coming after the fourteenth in order, position, time, etc. Often written: 15th
- (as noun)
- one of 15 equal or nearly equal parts of something
- (as modifier)
- the fraction equal to one divided by 15 (1/15)
- an interval of two octaves
- one of two notes constituting such an interval in relation to the other, esp the one higher in pitch
- an organ stop of diapason quality sounding a note two octaves higher than that normally produced by the key depressed; a two-foot stop
