Definition of "perimeter" []

• Mathematics A closed curve bounding a plane area. (noun)
• Mathematics The length of such a boundary. (noun)
• The outer limits of an area. See Synonyms at circumference. (noun)
• A fortified strip or boundary usually protecting a military position. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And he wanted any analyses that have been done to explain the implications of using the term "perimeter security," the rejection by some people of that term, and the approaches that might be adopted by the government to sell it to the public."
• "The rete rotates freely, and on the perimeter is a little prayer, which reads: "Oh great god of all bicycles,/Grant me safe passage,/Through the cars that kill, potholes that maim,/And glass that deflates my tires and my spirits.""
• "HUTTO: Actually inside what we call our perimeter, the heskos themselves."