This document discusses key terms in media studies, including semiotics, signs, signifiers, and signifieds. It provides the definition of semiotics as the science of signs and sign systems in society. It explains that a sign has two components: the signifier, which is the physical object like a word, and the signified, which is the meaning or concept conveyed. Genres rely on these signs and signifying practices to define them. For example, horror film conventions include scary settings and villains.