校验 is a verb meaning 'to verify' or 'to validate', especially in technical, computational, or procedural contexts. It combines 校 (jiào), meaning 'to check, compare, or examine carefully', and 验 (yàn), meaning 'to test, inspect, or confirm'. Together, they emphasize a rigorous, systematic process of cross-checking data, inputs, configurations, or physical measurements against standards or expected outcomes.

This term is widely used in IT (e.g., data integrity checks), healthcare (e.g., verifying patient ID or lab results), engineering, and finance. Unlike casual checking (检查), 校验 implies precision, often involving automated tools or formal protocols. It frequently appears in compound terms like 校验码 (check code) or 校验失败 (validation failure). While it can appear as a noun in technical documentation (e.g., 'perform the 校验'), its core function is verbal — describing an action with purpose and method.