1 to show that sth is true 证实；确证: to validate a claim/theory 确证一个要求╱一种理论 [OPP] invalidate 反义词为invalidate

2 to make sth legally valid 使具有法律效力；使生效: to validate a contract 使一项合约生效 [OPP] invalidate 反义词为invalidate

3 to state officially that sth is useful and of an acceptable standard 确认；批准: Check that their courses have been validated by a reputable organization. 查一下他们的课程是否已经得某个有信誉的组织确认。 ➔validation /ˌvælɪˈdeɪʃn ||; ˌvæləˈdeʃən/ noun [U]