eighteen
noun
- a number that is one more than seventeen
- natural number
adjective
- having or representing the number eighteen
Wiktionary
Pronunciation: /ˈeɪ(t).tin/ / /ˈeɪ.tiːn/ / /ˌeɪ(t)ˈtin/
name
Etymology: Derived from place names such as Ayton, Eaton, and Eton.
- A surname.
num
Etymology: Etymology tree Proto-Indo-European *oḱtṓw Proto-Germanic *ahtōu Proto-Indo-European *déḱm̥ Proto-Germanic *tehun Proto-Germanic *ahtōutehun Anglian Old English eahtatēne Middle English eightetene English eighteen From Middle English eightetene, eiȝtene, ehtetene, from Old English eahtatīene, eahtatēne, from Proto-Germanic *ahtōutehun. Cognate with West Frisian achttjin, Dutch achttien, German achtzehn, Danish atten. Equivalent to eight + -teen
- The cardinal number occurring after seventeen and before nineteen, represented in Roman numerals as XVIII and in Arabic numerals as 18.
“The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age.”