1 to use your authority to reject sb's decision, order, etc （利用权力）拒绝，不理会（某人的决定、命令等）: They overrode my protest and continued with the meeting. 他们不理会我的反对，继续开会。

2 to be more important than sth 比…更重要

3 to stop sth being done automatically in order to control it yourself 消除，超驰（自动控制）: You need a special password to override the safety lock. 你需要有特定的密码来超驰安全锁。