A lexicona collection of words, or the words known by a person or language can mean a reference book of words, or a person’s mental store of words. In everyday English, it most often refers to a dictionary or word list, but in linguisticsthe scientific study of language and how it works it can also mean the vocabularyall the words known and used by a person or language stored in someone’s mind.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /ˈlɛksɪˌkɑn/
Easy pronunciation: LEK-si-kahn (approximate spelling).
Stress: Stress on the first syllable, with a secondary stress on the third syllable.
Pronounced here in the dictionary/book sense, not the linguistic knowledge sense.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Lexicon Meaning
a dictionary or word list
Part of speech: noun
Definition: a reference book containing an alphabetical list of words with information about them
Example: I looked it up in the lexicon.
Synonyms for this meaning:
- dictionary — Direct substitute for the book/reference-book sense.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Other Meanings of Lexicon
Meaning 2
the words someone knows or uses
Part of speech: noun
Definition: a language user's knowledge of words
Example: Her English lexicon has grown a lot since she moved abroad.
Synonyms for this meaning:
- vocabulary — A natural substitute when referring to the words a person knows or uses.
- mental lexicon — Technical term for the words stored in a speaker's mind.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Lexicon Synonyms
Similar Meaning
- dictionary
a person’s knowledge of words
- vocabulary
- mental lexicon
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Common Mistakes
- Do not confuse lexicon with vocabulary in every context: lexicon can mean a reference book, while vocabulary usually means the words a person knows or uses.
- In linguistics, lexicon can refer to the mental store of words, not just a printed dictionary.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does lexicon mean?
Lexicon can mean a dictionary or word list, or it can mean the words a person knows and uses.
Is lexicon the same as dictionary?
Sometimes, yes. When lexicon refers to a reference book of words, dictionary is a good synonym. But lexicon can also mean a speaker’s mental store of words.
What are the synonyms of lexicon?
For the book sense, dictionary is the main synonym. For the knowledge-of-words sense, vocabulary and mental lexicon are the best matches.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
