Lexeme (Lexicon) and word forms | Cognitive Science | BSc.CSIT (TU) | Fourth Semester

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LexiconLexicon in Natural Language processing
Fourth Semester | Tribhuvan University (TU)
Subject: Cognitive Science | BSc.CSIT

Lexeme (Lexicon) and word forms
The distinction between these two senses of “word” is arguably the most important one in morphology. The first sense of “word”, the one in which dog and dogs are “the same word”, is called a lexeme. The second sense is called word form. We thus say that dog and dogs are different forms of the same lexeme. Dog and dog catcher, on the other hand, are different lexemes, as they refer to two different kinds of entities.

The form of a word that is chosen conventionally to represent the canonical form of a word is called a lemma, or citation form. A lexicon defines the words of a language that a system knows about. This is includes common words and words that are specific to the domain of the application. Entries include meanings for each word and its syntactic and morphological behavior.

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