Culture can be defined as the set of understandings shared by a community, including values, ideas, perceptions, and codes of conduct. This document discusses several aspects of culture, including value systems, norms, aesthetics, customs, and language. It provides examples of how different cultures approach concepts like eye contact, colors, and hygiene. The document also summarizes several models for understanding cultural dimensions, such as Hofstede's model of power distance, uncertainty avoidance, individualism vs collectivism, and masculinity. Trompenaar's 7 dimensions model is also briefly outlined.