verb · to officially or formally conclude a fact, amount, or status after investigation or judgment

法院认定该行为属于正当防卫。

verb · to be of the firm opinion or conviction that something is true

他认定这件事背后肯定有阴谋。

verb · to fix one's resolution or choice on a particular person, object, or goal

既然认定了这个目标，就要努力实现。