Social semiotics (also social semantics) is a branch of the field of semiotics which investigates human signifying practices in specific social and cultural circumstances, and which tries to explain meaning-making as a social practice. Semiotics, as originally defined by Ferdinand de Saussure, is "the science of the life of signs in society". Social semiotics expands on Saussure's founding insights by exploring the implications of the fact that the "codes" of language and communication are formed by social processes. The crucial implication here is that meanings and semiotic systems are shaped by relations of power, and that as power shifts in society, our languages and other systems of socially accepted meanings can and do change. Social semiotics is the study of the social dimensions of meaning, and of the power of human processes of signification and interpretation (known as semiosis) in shaping individuals and societies. Social semiotics focuses on social meaning-making practices of all types, whether visual, verbal or aural in nature. These different systems for meaning-making, or possible "channels" (e.g. speech, writing, images) are known as semiotic modes (or semiotic registers). Semiotic modes can include visual, verbal, written, gestural and musical resources for communication. They also include various "multimodal" ensembles of any of these modes Social semiotics can include the study of how people design and interpret meanings, the study of texts, and the study of how semiotic systems are shaped by social interests and ideologies, and how they are adapted as society changes (Hodge and Kress, 1988). Structuralist semiotics in the tradition of Ferdinand de Saussure focused primarily on theorising semiotic systems or structures (termed langue by de Saussure, which change diachronically, i.e. over longer periods of time). In contrast, social semiotics tries to account for the variability of semiotic practices termed parole by Saussure.