eight·eenth [eighteentheighteenths] [ˌeɪˈtiːnθ] ; [ˌeɪˈtiːnθ] ordinal number, noun There are examples of how to use ordinal numbers at the entry for fifth.
eigh·teen /ˌeɪtˈtiːn/ noun, pl-teens[count] : the number 18
- eighteenadj • eighteen years
- eighteenpronoun • Eighteen (of them) were present.
- eigh·teenth /ˌeɪtˈtiːnɵ/ noun, pl-teenths[count] • one eighteenth of the total
- eighteenthadj • the eighteenth day
- eighteenthadv • He finished eighteenth in the race.
