Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for eighteen from the 1913 edition of Webster's Revised Unabridged Dictionary. Define eighteen using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: Noun
Results: 3
1. Eight and ten; as, eighteen pounds.
Part of Speech: noun
1. The number greater by a unit than seventeen; eighteen units or objects.
2. A symbol denoting eighteen units, as 18 or xviii.
Examples of usage:
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