Noah Webster's New International Dictionary of the English Language
1. (n.) Half an em, that is, half of the unit of space in measuring printed matter. See Em.
2. (n.) A suffix from AS. -an, formerly used to form the plural of many nouns, as in ashen, eyen, oxen, all obs. except oxen. In some cases, such as children and brethren, it has been added to older plural forms.
3. (n.) A suffix corresponding to AS. -en and -on, formerly used to form the plural of verbs, as in housen, escapen.
4. (n.) A suffix signifying to make, to cause, used to form verbs from nouns and adjectives; as in strengthen, quicken, frighten. This must not be confused with -en corresponding in Old English to the AS. infinitive ending -an.
5. (n.) An adjectival suffix, meaning made of; as in golden, leaden, wooden.
6. (n.) The termination of the past participle of many strong verbs; as, in broken, gotten, trodden.