地理 (chiri) means "geography." You use it to refer to the study of the Earth's physical features, atmosphere, and human activity as it affects and is affected by these. It involves understanding landscapes, climates, and populations. For example, 「地理の授業は面白いです。」 (Geography class is interesting.)

地球の自然や人々、文化、環境について学ぶ学問です。「地理の授業は面白いです。」