The first four lectures revolve around field semantics - research methods for studying linguistic meaning under fieldwork conditions. The remaining six lectures deal with semantic typology , the crosslinguistic study of how humans communicate about the world in terms of the meaning categories of the languages they speak. Together, the lectures present one of the first comprehensive introductions to either topic. A thread pervading the lectures involves the following questions: how much do languages vary in how they represent reality? To what extent does this variation reflect cultural differences? To what extent does it influence the nonverbal thinking of the speakers?.