Conceptual metaphor: In cognitive linguistics, metaphor is defined as understanding one conceptual domain in terms of another conceptual domain; for example, using one person's life experience to understand a different person's experience. A conceptual domain can be any coherent organization of experience. This idea, and a detailed examination of the underlying processes, was first extensively explored by George Lakoff and Mark Johnson in Metaphors We Live By. Cognitive scientists often study subjects similar to conceptual metaphor under the label of "analogy."