» For its use in the context of Computer Science, see Lexical analysis. A lexeme 's an abstract unit of morphological analysis in linguistics, that roughly corresponds to a set of forms taken by a single word. For example, in the English language, run, runs, ran and running are forms of the same lexeme, conventionally written as RUN. A related concept's the lemma (or citation form), which's a particular form of a lexeme that's chosen by convention to represent a canonical form of a lexeme. Lemm… (More on Lexeme)