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A lexicon (plural: lexicons, rarely lexica) is the vocabulary of a language or branch of knowledge (such as nautical or medical). In linguistics , a lexicon is a language's inventory of lexemes . The word lexicon derives from Greek word λεξικόν ( lexikon ), neuter of λεξικός ( lexikos ) meaning 'of or for words'.
Lexical tokenization is conversion of a text into (semantically or syntactically) meaningful lexical tokens belonging to categories defined by a "lexer" program. In case of a natural language, those categories include nouns, verbs, adjectives, punctuations etc.
In linguistics, lexical similarity is a measure of the degree to which the word sets of two given languages are similar. A lexical similarity of 1 (or 100%) would mean a total overlap between vocabularies, whereas 0 means there are no common words.
Lexical corpus or lexis, a complete set of all words in a language; Lexical item, a basic unit of lexicographical classification; Lexicon, the vocabulary of a person, language, or branch of knowledge
Lexical semantics (also known as lexicosemantics), as a subfield of linguistic semantics, is the study of word meanings. [1] [2] It includes the study of how words structure their meaning, how they act in grammar and compositionality, [1] and the relationships between the distinct senses and uses of a word.
The lexical definition of a term, also known as the dictionary definition, is the definition closely matching the meaning of the term in common usage. As its other name implies, this is the sort of definition one is likely to find in the dictionary.
In computer science, a lexical grammar or lexical structure is a formal grammar defining the syntax of tokens.The program is written using characters that are defined by the lexical structure of the language used.
In lexicography [citation needed], a lexical item is a single word, a part of a word, or a chain of words that forms the basic elements of a language's lexicon (≈ vocabulary).