eighteenth

== English == === Etymology === From Middle English eiȝtenþe, from Old English eahtatēoþa, from Proto-Germanic *ahtudô tehundô. Equivalent to eighteen +‎ -th (ordinal suffix). === Pronunciation === IPA(key): /ˌeɪˈtiːnθ/ Rhymes: -iːnθ Hyphenation: eigh‧teenth === Adjective === eighteenth The ordinal form of the number eighteen. ==== Synonyms ==== 18th, 18th, XVIIIth; (in royal, papal and other names; for centuries) XVIII eighteenth ==== Derived terms ==== ==== Translations ==== === Noun === eighteenth (plural eighteenths) The person or thing in the eighteenth position. One of eighteen equal parts of a whole. (informal) A party to celebrate an eighteenth birthday. ==== Synonyms ==== 18th XVIIIth ==== Translations ====