Lexeme

Noun

1. A lexical item corresponding to the set of all words (or of all multi-word expressions) that are semantically related through inflection of a particular shared basic form. The abstract minimum unit of language or meaning that underlies such a set.
2. The abstract minimum unit of language or meaning that underlies such a set.
3. The set itself; a lexemic family.
4. The wordform chosen to represent such a set or family.
5. An individual instance of a continuous character sequence without spaces, used in lexical analysis.