When people call an issue in a discussion peripheral, they mean that it's not of primary importance, and they're probably suggesting that everyone get back to the main topic.

us / pəˈrɪf·ər·əl / a piece of equipment, such as a printer, that can be connected to a computer (Definition of peripheral from the Cambridge Academic Content Dictionary © Cambridge University Press)

PERIPHERAL definition: relating to, situated in, or constituting the periphery. See examples of peripheral used in a sentence.

Define peripheral. peripheral synonyms, peripheral pronunciation, peripheral translation, English dictionary definition of peripheral. adj. 1. Related to, located in, or constituting an outer boundary or …

of or relating to the periphery: the peripheral boundaries. concerned with less central aspects of a problem or situation: questions peripheral to the main issue.

PERIPHERAL meaning: 1 : not relating to the main or most important part often + to; 2 : connected to a computer but not an essential part of it

Peripheral areas of land are ones which are on the edge of a larger area. ...peripheral regions beyond the reach of powerful rulers. ...urban development in the outer peripheral areas of large towns.

Factsheet What does the word peripheral mean? There are five meanings listed in OED's entry for the word peripheral. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Definition of peripheral adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Scanners, printers, and speakers are peripheral devices for a computer because they aren't central to the working of the computer itself. Anything peripheral is on the margin, or outside, while main things, …