Refers to a projectile fired from a cannon or artillery piece. In modern contexts, typically an artillery shell.
An enemy shell landed near the trench.
博物館に古い砲弾が展示されている。
Old cannonballs are on display at the museum.
The shell struck the enemy's position.
We heard the sound of shells flying in from a distance.
The army fired shells into the town.
The village came under a heavy barrage of shells.