Eighteen Definition

ā-tēn
noun
The cardinal number between seventeen and nineteen; 18; XVIII.
Webster's New World
The 18th in a set or sequence.
American Heritage
Synonyms:
adjective
Totaling eight more than ten.
Webster's New World
Synonyms:

Other Word Forms of Eighteen

Noun

Singular:
eighteen
Plural:
eighteens

Origin of Eighteen

  • Middle English eightetene from Old English eahtatēne oktō(u) in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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eighteen