1) Semiotics is the study of signs and how they construct meaning. It examines how symbolic, written, and technical signs are used and understood. Key theorists include Ferdinand de Saussure and Roland Barthes.
2) Denotation refers to the literal or surface meaning of a sign, while connotation encompasses the deeper meanings and associations that are culturally dependent.
3) Signs take on different meanings depending on cultural context. For example, the color white has different connotations in Britain, China, and other cultures.