The monetary amount of eighteen pence.

octodecimo (as a paper size in printing).

plural of eighteenmo

Having a value or cost of eighteenpence.

(informal) Of about eighteen years of age.

In the eighteenth place; eighteenth in a row.

By a factor of eighteen.

By a factor of eighteen.

(history) The period from 1688 to 1815, beginning with the Glorious Revolution and ending with the Battle of Waterloo. / (history) The period from 1660 to 1830.

The ordinal form of the number eighteen.