outer

UK: /ˈaʊtə^r/ US: /ˈaʊtɚ/ ,(ou′tər)

WordReference Random House Learner's Dictionary of American English © 2025

out•er /ˈaʊtɚ/   adj. [before a noun]

1. located on or toward the outside;
   exterior:
   an outer wall.
2. located farther out or farther from the center:
   the outer planets of the solar system.

WordReference Random House Unabridged Dictionary of American English © 2025

out•er  (ou′tər), adj. 

1. situated on or toward the outside;
   external;
   exterior:
   outer garments; an outer wall.
2. situated farther out or farther from the center:
   the outer reaches of space.
3. of or pertaining to the external world.

• 1350–1400; Middle English; see out, -er⁴

out′er•ness, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

outer / ˈaʊtə/ adjective (prenominal)

1. being or located on the outside; external
2. further from the middle or central part

noun

1. the white outermost ring on a target
2. a shot that hits this ring
3. the unsheltered part of the spectator area at a sports ground
4. on the outer ⇒ excluded or neglected