Next in order after the fifteenth; being the sixth after the tenth: the ordinal of sixteen.Being one of sixteen equal parts into which a whole is divided.n. One of sixteen equal parts.n. In music: The melodic or harmonic interval of two octaves and a second.n. A sixteenth-note.n. In early Eng. law. a sixteenth of the rents of the year, or of movables, or both, granted or levied by way of tax.