Source : Webster's Revised Unabridged Dictionary (1913)

Shelter \Shel"ter\, v. t. [imp. & p. p. {Sheltered}; p. pr. &
   vb. n. {Sheltering}.]
   1. To be a shelter for; to provide with a shelter; to cover
      from injury or annoyance; to shield; to protect.

            Those ruins sheltered once his sacred head.
                                                  --Dryden.

            You have no convents . . . in which such persons may
            be received and sheltered.            --Southey.

   2. To screen or cover from notice; to disguise.

            In vain I strove to cheek my growing flame, Or
            shelter passion under friendship's name. --Prior.

   3. To betake to cover, or to a safe place; -- used
      reflexively.

            They sheltered themselves under a rock. --Abp.
                                                  Abbot.

Source : WordNet®

sheltered
     adj : protected from danger or bad weather; "a sheltered harbor"