集合 (jí hé) means 'to assemble' or 'to gather' — typically referring to people coming together at a specific place and time, often for an organized purpose. The character 集 (jí) originally meant 'to alight (as birds)' and evolved to mean 'to collect' or 'to converge'; 合 (hé) means 'to join', 'to unite', or 'to combine'. Together, they emphasize coordinated, intentional coming-together rather than casual meeting.

This word is commonly used in school, military, workplace, or community settings — for instance, students assembling before class, troops gathering for roll call, or volunteers meeting for a clean-up event. It implies structure, expectation, and shared purpose, and is more formal than verbs like 见面 (jiànmiàn, 'to meet') or 聚会 (jùhuì, 'to get together socially'). While it can occasionally refer to abstract collections (e.g., data sets), its primary use is physical, collective assembly of people.