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Definition of lexicon

lexicon

/ˈlɛksɪkɒn/
lex · i · con
Adverb:lexically
•
Plural:lexicons
•
Adjective:lexical
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lexicon Lexical Profile

lexicon Game Scores & Validity

• noun

1

The complete vocabulary of a person, language, or branch of knowledge.

Example

"The rapid growth of the internet has introduced hundreds of new terms into our everyday lexicon."

2

A dictionary, especially an alphabetical reference work of Ancient Greek, Hebrew, Syriac, or Arabic.

Example

"The divinity student consulted a Hebrew lexicon to verify the exact meaning of the biblical root."

3

In linguistics, the complete inventory of morphemes and words in a language, or a speaker's mental dictionary of stored lexical items.

Example

"Children acquire new entries in their mental lexicon at an astonishing rate during early childhood."

Synonyms
View all synonyms for lexicon

• Nearby Words

lewis
lewis falls
lewisia
lexicon
lexington
leycesteria
lhotse

Word Origin & Etymology

Borrowed in the early 17th century from Modern Latin lexicon, from Ancient Greek lexikon (biblion) meaning 'wordbook', derived from lexis ('word, speech') and legein ('to speak').

Cite this Entry

Wordmom. (2026). Definition of Lexicon. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/lexicon
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