The function of metaphor is described and defined and a system of interpretation is delineated. Historical and current usage of metaphors are discussed with emphasis on the all-inclusiveness of existing definitions. Metaphoric systems of interpretation as tools of vivid and concise communication, as creating or revealing something new, as transforming a perspective, and as simultaneously representing multiple interests are elaborated. It is concluded that metaphor is not a unitary class, that there are at least four systems for interpreting metaphors, and that the system by which one interprets metaphors is related to one's assumptions about the goals of discourse and not to one's academic discipline or the domain of discourse. Suggestions for further research are provided. (Copyright 1992, Sociological Abstracts, Inc., all rights reserved) (LLBA 1992, vol. 26, n. 2)