Lexicon definition

lĕksĭ-kŏn
A dictionary.
noun
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A record or inventory.

A notable case in the lexicon of subversion.

noun
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A stock of terms used in a particular profession, subject, or style; a vocabulary.

The lexicon of surrealist art.

noun
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The vocabulary used by or known to an individual. (Also called lexical knowledge)
noun
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(linguis.) The total stock of morphemes in a language.
noun
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(linguistics) The morphemes of a language considered as a group.
noun
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(linguistics) A dictionary that includes or focuses on lexemes.
noun
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A vocabulary specific to a certain subject.

A baseball lexicon.

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noun
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The definition of a lexicon is a dictionary or the vocabulary of a language, a people or a subject.

An example of lexicon is YourDictionary.com.

An example of lexicon is a set of medical terms.

noun
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A dictionary, esp. of an ancient language.
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The special vocabulary of a particular author, field of study, etc.
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A dictionary of Classical Greek, Hebrew, Latin, or Aramaic.
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(rare) Any dictionary.
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(programming) The lexicology of a programming language. (Usually called lexical structure.)
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Other Word Forms

Noun

Singular:
lexicon
Plural:
lexica, lexicons

Origin of lexicon

  • Medieval Latin from Greek lexikon (biblion) word(book) from neuter of lexikos of words from lexis word from legein to speak leg- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • English from the 17th century, from a Medieval Latin or New Latin lexicon, from Ancient Greek λεξικόν (lexicon, “a lexicon"), neuter of λεξικός (lexikos, “of words"), from λέξις (lexis, “a saying, speech, word"), from λέγειν (legein, “to speak").

    From Wiktionary