eighteenth: Meaning and Definition of
eight•eenth
Pronunciation: (ā'tēnth'), [key]
— adj.
- next after the seventeenth; being the ordinal number for 18.
- being one of 18 equal parts.
—n.
- an eighteenth part, esp. of one ().
- the eighteenth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.