adj next after the tenth; as, the eleventh chapter.
2. eleventh ·adj of or pertaining to the interval of the octave and the fourth.
3. eleventh ·noun the quotient of a unit divided by eleven; one of eleven equal parts.
4. eleventh ·noun the interval consisting of ten conjunct degrees; the interval made up of an octave and a fourth.
5. eleventh ·adj constituting one of eleven parts into which a thing is divided; as, the eleventh part of a thing.