Meaning : Electronic equipment external to the circuit board that contains the CPU of a computer.
Example :
Disk drives and printers are important peripherals.
Synonyms : computer peripheral, peripheral device
Meaning : On or near an edge or constituting an outer boundary. The outer area.
Example :
Russia's peripheral provinces.
Peripheral suburbs.
Meaning : Related to the key issue but not of central importance.
Example :
A peripheral interest.
Energy is far from a peripheral issue in the economy.
Peripheral issues.