E*lev"enth (?), a. [Cf. AS. endlyfta. See Eleven.]
1.
Next after the tenth; as, the eleventh chapter.
2.
Constituting one of eleven parts into which a thing is divided; as, the eleventh part of a thing.
3. Mus.
Of or pertaining to the interval of the octave and the fourth.
© Webster 1913.
E*lev"enth, n.
1.
The quotient of a unit divided by eleven; one of eleven equal parts.
2. Mus.
The interval consisting of ten conjunct degrees; the interval made up of an octave and a fourth.
© Webster 1913.