eleventh Your browser does not support the audio element. [ English ] Definition An interval of eleven diatonic degrees, counting the first and last degree. For example, an eleventh above C would be F (or an interval of an octave and a fourth). See Also [English] eleventh chord Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2016-05-24 13:44:30