To surround on all sides; to encircle or crowd around someone or something.
子どもたちが先生を取り囲んで質問した。
The children surrounded the teacher and asked questions.
パパラッチが有名俳優を取り囲んだ。
The paparazzi surrounded the famous actor.
敵に取り囲まれて、撤退するしかなかった。
We were surrounded by the enemy and had no choice but to retreat.