noun
encirclement; encircling net; tight besiegement
Refers to a surrounding net or ring, often used in military, police, or figurative contexts for a tight encirclement.
警察は犯人の包囲網を狭めた。
The police tightened the net around the suspect.
敵軍は包囲網を突破しようとした。
The enemy forces tried to break through the encirclement.