peripheral

peripheral — adjective

1. connected to the main subject or activity, but not one of its important parts.

1.adjectiveC1
Definition

connected to the main subject or activity, but not one of its important parts.

Example

Cost was peripheral to Mia's choice of nursing school.

be peripheral to + noun

In the meeting, parking rules stayed peripheral to the budget crisis.

Common collocations
  • peripheral issue
  • peripheral concern
  • peripheral role
  • remain peripheral
  • peripheral to the debate
  • peripheral to the story
Synonyms
  • secondary

    close in meaning, but often suggests second place in rank or order.

  • minor

    more everyday and often means small as well as less important.

  • marginal

    often suggests being pushed to the edge or given too little attention.

  • supplementary

    emphasizes something added to support the main part.

Antonyms
  • central

    most important or at the heart of something.

  • main

    the chief or most important part.

  • primary

    formal word for first in importance.

Grammar Patterns

peripheral issue

peripheral concern

peripheral role

be peripheral to + noun

Usage Note

Often appears with abstract nouns such as issue, concern, role, or detail. Frequently followed by 'to' when you say what the less important thing is compared with; distinguish from adjective/2, which is about physical position near an edge.

Common Mistakes

Cost was peripheral for our decision.
Cost was peripheral to our decision.
this sense usually takes 'to', not 'for'.

2. in the outer part of an area, building, or other space, rather than near the cen

2.adjectiveC1
Definition

in the outer part of an area, building, or other space, rather than near the center.

Example

Street markets grew in peripheral districts beyond the old city walls.

before noun: peripheral districts

A small clinic serves peripheral villages near the mountain border.

Common collocations
  • peripheral district
  • peripheral village
  • peripheral road
  • peripheral land
  • peripheral room
  • peripheral area
Synonyms
  • outer

    more general and usable for many physical shapes.

  • outlying

    often used for areas some distance from a town or center.

  • edge

    usually appears in phrases like 'edge area' rather than as a direct synonym.

Antonyms
  • central

    in or near the middle of an area.

  • inner

    closer to the middle or inside.

Grammar Patterns

peripheral area

peripheral district

peripheral road

peripheral room

Usage Note

Usually modifies nouns for places or parts of spaces, such as districts, roads, rooms, or villages. Distinguish from adjective/1: this sense describes outer location, not lesser importance.

Common Mistakes

Their office is on a peripheral street downtown.
Their office is on a side street downtown.' / 'Their office is in a peripheral district.
'peripheral' suggests the outer part of an area, not a street in the city center.

peripheral — noun

Word family

  • periphery
    nounC2
  • peripherally
    adverbC2

Synonym discussion

Sense: adjective/1

For adjective/1, peripheral means linked to the main subject but not important within it. Secondary is close, though it often suggests second place in rank, order, or priority. Minor is more everyday and can also mean small in size or effect, so it is less precise. Marginal often carries a more negative feeling, suggesting that something has been pushed to the edge or given too little notice. Supplementary is different again: it describes extra material added to support the main part, not simply a less important one. You can say cost was peripheral to the debate, a secondary goal came later, a minor error caused little trouble, and supplementary notes were added at the end.

peripheral ↗secondary ↗minor ↗marginal ↗supplementary ↗

Etymology

GreekFrenchEnglish

Peripheral came into English through French from words based on Greek periphereia, which referred to a line or area around something. The Greek parts are peri, meaning 'around', and a verb meaning 'carry' or 'bring'. English first used the word for things at the outer edge, and later extended that picture to mean things that are not central in importance.