The term 'on the perimeter' can be summarized as being located on the OUTER edge of something. The crossword solution for this term is 'OUTER', which is a five-letter word that means located on the outside or edge of something. This phrase is often used to describe the location of something, such as a building or a person, in relation to the boundaries of a larger area. It can also be used to describe the position of an object in relation to other objects.