LEXICON a knowledge base listing all the distinct spellings found as a proper name, i.e., elements of noun phrases when used as names of persons, places, or time periods; the l. is a plugable component of the standardization process, used by the classifier; the form of the l. entry is 1) a spelling followed by 2a) a set of category symbols, 2b)a set of cultures with the relative frequency of its occurrence then and there, and 2c) any co-occurrence restrictions; the l. entry also gives 3) the class, whether standard, deviant, and kind, e.g., nickname, and 4) reference to its morpheme’s name group, etc.; the category in the l. entry whose instances are most frequent is the typical usage of the word