The Collaborative International Dictionary of English v.0.48:

Outlying \Out"ly`ing\, a.
   Lying or being at a distance from the central part, or the
   main body; being on, or beyond, the frontier; exterior;
   remote; detached.
   [1913 Webster] Outmaneuver

WordNet (r) 3.0 (2006):

outlying
    adj 1: relatively far from a center or middle; "outlying
           settlements"

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "outlying":
   apparent, cortical, distant, epidermic, exomorphic, exterior,
   external, extraneous, extraorganismal, extrinsic, far, far-flung,
   far-off, faraway, farthest, foreign, fringe, furthest, impersonal,
   nonsubjective, objective, open, out, out-of-the-way, outer,
   outermost, outmost, outside, outstanding, outward, outward-facing,
   peripheral, public, remote, removed, roundabout, seeming,
   superficial, surface