To regain control of your emotions after being upset.
After the argument, she needed to collect herself before speaking.
論争の後、彼女は話す前に自分自身を収集する必要がありました。
To focus your mind before doing something important.
He took a deep breath to collect himself before the big presentation.
彼は大きなプレゼンテーションの前に深い息を吸って自分自身を収集しました。