This classic research monograph develops and illustrates the theory of linguistic structure known as Cognitive Grammar, and applies it to representative phenomena in English and other languages. Cognitive grammar views language as an integral facet of cognition and claims that grammatical structure cannot be understood or revealingly described independently of semantic considerations. It argues that grammar forms a continuum with the lexicon and is reducible to symbolic relationships (i.e. form-meaning pairings), and consequently that all valid grammatical constructs have some kind of conceptual import. The coherence and descriptive potential of cognitive grammar are exemplified by application to a broad variety of grammatical phenomena drawn from numerous languages.