Origin of eighteenMiddle English eightetene from Old English eahtatiene: see eight and teen
- The cardinal number equal to 17 + 1.
- The 18th in a set or sequence.
Origin of eighteenMiddle English eightetene from Old English eahtatēne ; see oktō(u) in Indo-European roots.
- Ordinal: eighteenth
From Middle English ehtetene, from Old English eahtatīene, eahtatēne, from Proto-Germanic *ahtōutehun. Compare West Frisian achttjin, Dutch achttien, German achtzehn, Danish atten.
- Brandon is eighteen, and Ashley will be soon.
- So, when he was eighteen years old, he ran away from his pleasant home and went to sea.
- In the eighteen-nineties Ouray had three thousand people living in town, three or four times as many as today.
- She'd stayed after she turned eighteen, because he was the only one who understood her strange gift.
- All persons under the age of eighteen must complete and mail a consent of minors use of the ice park in the box below.