King James Dictionary 
1. That which covers or defends from injury or annoyance. A house is a shelter from rain and other inclemencies of the weather the foliage of a tree is a shelter from the rays of the sun.
The healing plant shall aid,
From storms a shelter, and from heat a shade. Pope.
2. The state of being covered and protected protection security.
Who into shelter takes their tender bloom. Young.
3. He that defends or guards from danger.
1. To cover from violence, injury, annoyance or attack as a valley sheltered from the north wind by a mountain.
Those ruins shelter'd once his sacred head. Dryden.
We besought the deep shelter to us. Milton.
2. To defend to protect from danger to secure or render safe to harbor.
What endless shall you gain,
to save and shelter Troy's unhappy train? Dryden.
3. To betake to cover or a safe place.
They sheltered themselves under a rock. Abbot.
4. To cover from notice to disguise for protection.
In vain I strove to check my growing flame,
Or shelter passion under friendship's name. Prior.
Shel'Ter, To take shelter.
There the Indian herdsman shunning heat,
Webster's Dictionary 
(1): ( n.) The state of being covered and protected; protection; security.
(2): ( v. t.) To be a shelter for; to provide with a shelter; to cover from injury or annoyance; to shield; to protect.
(3): ( n.) That which covers or defends from injury or annoyance; a protection; a screen.
(4): ( n.) One who protects; a guardian; a defender.
(5): ( v. t.) To betake to cover, or to a safe place; - used reflexively.
(6): ( v. t.) To screen or cover from notice; to disguise.
(7): ( v. i.) To take shelter.