periphery

noun

pe·​riph·​ery pə-ˈri-f(ə-)rē 

plural peripheries

1

: the perimeter of a circle or other closed curve

also : the perimeter of a polygon

2

: the external boundary or surface of a body

3

a

: the outward bounds of something as distinguished from its internal regions or center : confines

b

: an area lying beyond the strict limits of a thing

Synonyms of periphery

• perimeter
• edge
• confines
• circumference
• boundary
• border
• edging

Examples of periphery in a Sentence

the dogs are confined by an invisible electronic fence that runs along the periphery of the yard

Recent Examples on the Web

If students have nerves about speaking on school grounds, those on the peripheries of campus don’t face the same dilemma. — Savannah Walsh, Vanity Fair, 14 Oct. 2026

Some predominantly Muslim neighborhoods on the city's peripheries, with narrow and steep mazelike streets, have high crime rates. — ABC News, 12 Oct. 2026

After spending so much of the year on the periphery, Anthony Volpe suddenly found himself at the center of the biggest moment in the Yankees’ season. — Peter Sblendorio, New York Daily News, 8 Oct. 2026

Mathys Tel The signings of Savio and Omar Marmoush, and Mohammed Kudus’ return to fitness, have forced Tel to the peripheries. — Dan Kilpatrick, New York Times, 7 Oct. 2026

Word History

Etymology

Middle French peripherie, from Late Latin peripheria, from Greek periphereia, from peripherein to carry around, from peri- + pherein to carry — more at bear

First Known Use

circa 1568, in the meaning defined at sense 1

Kids Definition

periphery

noun

pe·​riph·​ery pə-ˈrif-(ə-)rē 

plural peripheries

1

: the boundary or surface of a body or figure

2

: the outer or outermost part

Medical Definition

periphery

noun

pe·​riph·​ery pə-ˈrif-(ə-)rē 

plural peripheries

1

: the outward bounds of something as distinguished from its internal regions or center

2

: the regions (as the sense organs, the muscles, or the viscera) in which nerves terminate