To provide protection of defense for something.
To fortify something with a wall or rampart.
A defensive wall or rampart.
A defense or safeguard.
A breakwater.
Any means of defence or security.
The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard.
To provide cover from damage or harassment; to shield; to protect.
To take cover.
A refuge, haven or other cover or protection from something.
An institution that provides temporary housing for homeless people, battered women, etc.