I. -ən(t)th, - ə mth adjective
Etymology: Middle English enlefte, ellefte, enleventhe, elleventhe, adjective & noun, from Old English endleofta, endlyfta (akin to Old High German einlifto eleventh, Old Norse ellifti ), from endleofan eleven + -tha -th
1. : being number 11 in a countable series — see number table
2. : being one of 11 equal parts into which something is divisible
an eleventh share of the money
II. noun
( plural elevenths -ən(t)s, - ə m(p)s, -ən(t)ths, - ə mths)
Etymology: Middle English enlefte, ellefte, enleventhe, elleventhe
1. : number 11 in a countable series
the eleventh of the month
2. : the quotient of a unit divided by 11 : one of 11 equal parts of anything
one eleventh of the total
3.
a. : the musical interval made up of an octave and a fourth
b. : a tone at this interval