noun

• (countable) Somewhere one can find protection.
  "The band of explorers found a shelter behind the waterfall, which they rested at for three days."
• (countable) Somewhere one can find protection.
  "The detective kept them in view. He made his way casually along the inside of the shelter until he reached an open scuttle close to where the two men were standing talking. Eavesdropping was not a thing Larard would have practised from choice, but there were times when, in the public interest, he had to do it, and this was one of them."
• (countable) Somewhere one can find protection.
  "tornado shelter"
• (countable) Somewhere one can find protection.
  "(in compounds)"

verb

• (transitive) To provide cover from damage or harassment; to shield; to protect.
  "Those ruins sheltered once his sacred head."
• (intransitive) To take cover.
  "During the rainstorm, we sheltered under a tree."