Definitions

1. adjective

Protected or covered by a shell, especially a ship’s armor.

“The tank was shellbound, making it nearly invulnerable to enemy fire.”

2. noun

A person or ship protected by a shell, especially armor.

“The heavily shellbound battleship dominated the battle.”

3. noun

A person or thing protected from harm or danger.

“The city was shellbound due to the effective air raid defense system.”