The word "perimeter" means a border or boundary of an area or figure. It can also refer to the length of a boundary, a line marking the edges of an area, or the outer limits of an area.
The word "perimeter" is derived from the Greek and Latin languages. The word "perimeter" can be used in a sentence as follows: "The perimeter of the property was bound by mountains to the east and the ocean to the west." Another example of the word "perimeter" used in a sentence is "The troops were ordered to secure the perimeter of the military base after spotting enemy spies in the distance."