to make a position, an agreement, etc. more definite or official; to establish somebody/something clearly
تأیید کردن, تثبیت کردن, قطعی کردن, رسمیت بخشیدن
Please write to confirm your reservation .
After a six-month probationary period, her position was confirmed.
Has everyone confirmed (that) they’re coming?
It has been confirmed that the meeting will take place next week.
He was confirmed as captain for the rest of the season.
I'm very happy to confirm you in your post.