Definition of lexicon in English:


Syllabification: lex·i·con
Pronunciation: /ˈleksiˌkän
, ˈleksiˌkən

noun (plural lexicons or lexica /-kə/)

1The vocabulary of a person, language, or branch of knowledge: the size of the English lexicon
More example sentences
  • These approaches have quite different origins in artificial intelligence and linguistics, and involve corpus input, lexicons and knowledge bases in quite different ways.
  • It seems from the neologistic lexicon that most branches of medicine can now have a telecoms component, from teleradiology and telepathology to telenursing and telepsychiatry.
  • We conclude that sophisticated numerical competence can be present in the absence of a well-developed lexicon of number words.
1.1A dictionary, especially of Greek, Hebrew, Syriac, or Arabic: a Greek-Latin lexicon
More example sentences
  • That of course is where Greek lexicons like those referenced to above are helpful.
  • It is just as easy to access dictionaries, concordances and lexicons, the program having simultaneously located all references to your passage in the books included in your search.
  • They would just never consider looking it up in a dictionary or a lexicon.
dictionary, wordbook, vocabulary list, glossary, thesaurus


early 17th century: modern Latin, from Greek lexikon (biblion) '(book) of words', from lexis 'word', from legein 'speak'.

Definition of lexicon in: