This document discusses metaphor and metonymy. It provides examples of typical metaphor sources like body parts, animals, and plants. Typical metaphor targets are abstract concepts like technology, social change, and morality. Metaphors work by mapping qualities from a source domain onto an abstract target domain. Common conceptual metaphors include "life is a journey" and "anger is heat." Metaphors can become conventional over time or be used creatively and humorously. The document also discusses related concepts like similes, symbols, and metonymy.