环境 (huán jìng) literally combines 环 (huán), meaning 'circle' or 'surrounding', and 境 (jìng), meaning 'boundary', 'territory', or 'realm'. Together, they form the concept of 'the surroundings or conditions in which something exists' — that is, 'environment'. It refers broadly to natural, social, or physical settings, such as forests, cities, classrooms, or even digital spaces.

This word is commonly used in discussions about ecology (e.g., environmental protection), urban planning, education, and health. It often appears with modifiers like 自然 (zìrán, 'natural'), 社会 (shèhuì, 'social'), or 学习 (xuéxí, 'learning') to specify the type of environment. Unlike English 'environment', which can be countable ('environments'), 环境 is almost always uncountable in Chinese and rarely takes plural markers like 们 or classifiers like 个.