peripheral

adjective

1. on or near an edge or constituting an outer boundary; the outer area

- Russia's peripheral provinces

- peripheral suburbs

Similar word(s): circumferential, fringy, marginal, encircling, skirting

2. related to the key issue but not of central importance

- a peripheral interest

- energy is far from a peripheral issue in the economy

- peripheral issues

Similar word(s): incident, incidental

noun

1. electronic equipment external to the circuit board that contains the CPU of a computer

- disk drives and printers are important peripherals

Definition categories: man–made