To check or verify something to make sure it is correct or true.
出かける前に財布にお金があるか確かめてください。
Please check that you have money in your wallet before you go out.
予約の日時が正しいかメールで確かめた。
I checked by email to make sure the reservation date and time were correct.
ドアがちゃんと閉まっているか確かめてから寝る。
I make sure the door is properly closed before I sleep.
結果が正しいかどうか医師に確かめてもらった。
I had the doctor verify whether the results were correct.