'学校的' is a possessive phrase meaning 'school's' or 'of the school'. It consists of two characters forming the noun 'school' (学校, xué xiào), followed by the grammatical particle '的' (de), which marks possession or attribution—similar to English 's or 'of'. Unlike standalone nouns, '学校的' cannot function alone as a subject or object; it must modify another noun, such as '学校的老师' (the school's teacher) or '学校的图书馆' (the school's library). It indicates origin, affiliation, or ownership related to a specific school.

This phrase is neutral in register and commonly used in both spoken and written Chinese. It appears frequently in educational contexts, administrative communication, and everyday descriptions—e.g., when referring to facilities, staff, rules, or events tied to a particular institution. Note that '学校' itself means 'school', while adding '的' shifts the focus to something belonging to or associated with that school, not the institution itself.