LMBM is a lexeme-based morphologyMorphology
Robert Beard is professor emeritus at Bucknell University

LMBMLexeme-Morpheme Base Morphology (LMBM) is known for its rigorous distinction of lexemes and grammatical morphemes. The theory is formally described in Lexeme-Morpheme Base Morphology (1995). LMBM covers not only a competence theory, but it comes with a performance theory, a theory of the relation of morphology to semantics, and a theory of morphology in the brain. The literature on this website may seem outdated today, since I quit working on it when I retired in 2000. It still offers insights into what a complete theory of morphology must include:

  1. A competence theory of inflection (syntactic derivation) and word formation (lexical derivation)
    1. which explains empty morphemes, null morphemes, morphological over- and underdetermination, and other morphological phenomena,
    2. showing that the same categories that syntax (inflectional categories) operates over are used by the lexicon for word formation
    3. along with a complete list of those categories constraining both syntactic and lexical derivation
    4. and a complete list of lexical and morphological operations.
  2. A performance theory of the lexicon and morphology (Lexical Stock Expansion) that is included in LMBM.
  3. An explanation of the relationship of lexical categories to semantics that explains Decompositional Composition.
  4. A hypothesis of the relationship of morphological operations and the current knowledge of the operations of the brain (as of 1990).
This website will attempt to bring together in one, easily accessible place all my publications on LMBM scattered throughout the journals and collections.
Table of contents
  1. Outline of the Competence Theory
  2. The Unitary Grammatical Function Hypothesis
  3. Lexical Semantics
    1. The Indo-European Lexicon: A full synchronic theory (A PDF download)
    2. Decompositional Composition
    3. Simultaneous Dual Derivation in Word Formation
  4. Morpheme Order in a Lexeme/Morpheme-Base Morphology
  5. Plural is Word Formation
    1. The Plural as Lexical Derivation
    2. How Many Declensions?
  6. Morphological Performance Theory
    1. Lexical Stock Expansion
    2. A Note on Speech Errors
  7. LMBM and Word Syntax
  8. Neurological Evidence of LMBM

Comments and questions on all aspects of LMBM, Slavic, or general morphology, may be sent to Robert Beard via the contact page at The alphaDictionary Websiste or at ResearchGate.