To ascertain or determine something by careful observation; to judge or make sure of something.
相手の本心を見定めるのは簡単ではない。
It's not easy to ascertain the other person's true intentions.
実績を見定めた上で、採用かどうかを決めるつもりだ。
I plan to decide on hiring after evaluating their track record.
現状をよく見定めてから次の手を考えよう。
Let's assess the current situation carefully before planning the next move.