eleventh | meaning of eleventh in Longman Dictionary of Contemporary English | LDOCE

From Longman Dictionary of Contemporary Englisheleventhe‧lev‧enth1 /ɪˈlevənθ/ ●●● S3 W3 adjective    1 coming after ten other things in a series  in the eleventh century  her eleventh birthday2 → the eleventh hour —eleventh pronoun  I’m planning to leave on the eleventh (=the 11th day of the month).Examples from the Corpuseleventh• Tomorrow is her eleventh birthday.the eleventh• The meeting is on the eleventh.eleventheleventh2 noun [countable]    one of eleven equal parts of something