Added 9 October 2026 peripheral /pəˈɹɪf(ə)ɹ(ə)l/ noun Categories: ThingsEveryday Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about peripheral at Wordnik → Where our words come from → Electronic equipment external to the circuit board that contains the CPU of a computer. disk drives and printers are important peripherals adjective On or near an edge or constituting an outer boundary; the outer area. Russia's peripheral provinces Related to the key issue but not of central importance. a peripheral interest Related Words: incidentoff-baseedgeincidentalfringycircumferentialmarginalencirclingfringeskirting Back to today's word