What is the meaning of Lexicon?

The vocabulary of a language.

A dictionary that includes or focuses on lexemes.

A dictionary of Classical Greek, Hebrew, Latin, or Aramaic.

The lexicology of a programming language. (Usually called lexical structure.)

Any dictionary.

The vocabulary used by or known to an individual. (Also called lexical knowledge.)

A set of vocabulary specific to a certain subject.

A list thereof.

To add to a lexicon.

To shorten a soundtrack to fit a shortened version of a movie.

(clarification of this definition is needed) lexicon

a dictionary, a lexicon

lexicon

Source: wiktionary.org