Being the first after the fifth: the ordinal of sixBeing one of six equal parts into which a whole is divided.n. A sixth part.n. In early English law, a sixth of the rents of the year, or of movables, or both, granted or levied by way of tax.n. In music:n. A tone on the sixth degree above or below a given tone.n. The interval between any tone and a tone on the sixth degree above or beiow it.n. The harmonic combination of two tones at the interval thus describedn. In a scale, the sixth tone from the bottom; the submediant: solmizated la.n. the French sixth, consisting of the first, second, sixth, and sharped fourth of a minor scale;n. the German sixth, consisting of the first, third, sixth, and sharped fourth of such a scale;n. the Italian sixth, consisting of the first, sixth, and sharped fourth of such a scale.