outer

outer — adjective

1. nearer the edge, surface, or outside part of something than its middle

1.adjectiveB2
Definition

nearer the edge, surface, or outside part of something than its middle

Example

The outer door was locked, but the glass door inside was open.

contrast: outer door and inner door

Workers repaired the outer wall after the truck scraped the bricks.

collocation: outer wall

Common collocations
  • outer wall
  • outer edge
  • outer ring
  • outer row
  • outer pocket
Synonyms
  • outside

    can replace outer in some phrases, but it is more often an adverb or preposition

  • external

    is more formal and common in technical or business contexts

  • outward

    often suggests direction or movement rather than fixed position

  • peripheral

    is more formal and often used for things at the edge of a system or topic

Antonyms
  • inner

    means closer to the middle or inside

  • central

    means in or near the middle rather than near the edge

Grammar Patterns

outer wall

outer edge

outer ring

outer pocket

Usage Note

Usually appears before nouns for parts, layers, rows, or edges. Distinguish from outside: outer is an adjective before a noun, while outside can also act as an adverb or preposition.

Common Mistakes

The shop is in the outer of the station.
The shop is in the outer part of the station.' / 'The shop is outside the station.
outer normally needs a noun after it.
The children played outer.
The children played outside.
outer is an adjective, not an adverb.

Word family

  • outward
    adjectiveB2
  • outermost
    adjectiveC1

Synonym discussion

Sense: adjective/1

Outer is the most natural everyday adjective for a part near the edge or surface of something physical, such as an outer wall or outer pocket. Outside can sometimes replace it, but outside is far more common as an adverb or preposition, so it sounds less fixed before many nouns. External is more formal and often appears in technical, medical, or business contexts, as in external damage or external support. Outward often suggests direction away from the middle rather than a fixed position. Peripheral is also more formal and often describes something that is not central in importance. Say the outer door or outer layer, but outward movement and peripheral issues.

outside ↗external ↗outward ↗peripheral ↗

Common collocations

Nouns

  • outer wall
  • outer layer
  • outer edge
  • outer ring
  • outer row

Phrases

  • the outer part of
  • on the outer edge
  • in the outer pocket
  • the outer limits

Etymology

Old EnglishMiddle EnglishEnglish

Outer has been used in English since Middle English. It was built from out with the ending -er and gradually became the usual form for the idea of being farther out, while older related forms from Old English developed along different paths. That is why outer and utter are historically related, even though they now mean different things.