Define "ethnocentrism."

Ethnocentrism is defined as the belief in the superiority of one's own culture, which can lead to a bias against other cultures. This perspective often results in interpreting and judging other cultures through the lens of one's own cultural norms and values, which can foster misunderstanding and prejudice. Ethnocentrism can manifest in various ways, such as assuming that one's cultural practices and beliefs are the 'correct' or 'normal' ones, while viewing different practices as inferior or strange. This mindset can impact social interactions and hinder cross-cultural understanding and appreciation.

In contrast, the other options refer to different concepts. Learning multiple cultures emphasizes the acquisition and appreciation of diverse cultural perspectives, while cultural relativism is the idea that a person's beliefs and activities should be understood based on that person's own culture. The tendency to isolate oneself from cultural influences does not encapsulate the overarching notion of superiority and bias inherent in ethnocentrism.