What is "lexical database"

n. a database of information about words

A lexical database is a lexical resource which has an associated software environment database which permits access to its contents. The database may be custom-designed for the lexical information or a general-purpose database into which lexical information has been entered.

Information typically stored in a lexical database includes lexical category and synonyms of words, as well as semantic and phonological relations between different words or sets of words.