Noun
a minimal unit (as a word or stem) in the lexicon of a language; `go' and `went' and `gone' and `going' are all members of the English lexeme `go'
Source: WordNetA related concept is the lemma (or citation form), which is a particular form of a lexeme that is chosen by convention to represent a canonical form of a lexeme. Source: Internet
Compounding A compound word is a lexeme composed of several pre-existing morphemes. Source: Internet
For A lexeme ( About this sound pronunciation ( help · info ) ) is a unit of lexical meaning that exists regardless of the number of inflectional endings it may have or the number of words it may contain. Source: Internet
Derivation involves affixing bound (i.e. non-independent) forms to existing lexemes, whereby the addition of the affix derives a new lexeme. Source: Internet
For example, the difference between inflection and derivation can be stated in terms of lexemes: * Inflectional rules relate a lexeme to its forms. Source: Internet
Informally, word formation rules form "new" words (more accurately, new lexemes), while inflection rules yield variant forms of the "same" word (lexeme). Source: Internet