What is the meaning of surround?

noun

• The area in which something exists or lives.
  • usage: "the country-the flat agricultural surround"
  • synonyms: environment, environs, surroundings

verb

• Extend on all sides of simultaneously; encircle.
  • usage: "The forest surrounds my property"
  • synonyms: environ, ring, skirt, border
• Envelop completely.
  • usage: "smother the meat in gravy"
  • synonyms: smother
• Surround so as to force to give up.
  • usage: "The Turks besieged Vienna"
  • synonyms: besiege, beleaguer, hem in, circumvent
• Surround with a wall in order to fortify.
  • synonyms: wall, palisade, fence, fence in