The Collaborative International Dictionary of English v.0.48:

Out-of-the-way \Out`-of-the-way"\, a.
   1. See under Out, adv.
      [1913 Webster]

   2. Not on a main transportation route; inconveniently
      located.
      [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

out-of-the-way
    adj 1: out of the ordinary; "out-of-the-way information"
    2: improper or even offensive; "out-of-the-way remarks"
    3: remote from populous or much-traveled regions; "they found a
       quiet out-of-the-way resort" [syn: off the beaten track(p),
       out-of-the-way(a)]

Moby Thesaurus II by Grady Ward, 1.0:

169 Moby Thesaurus words for "out-of-the-way":
   Bohemian, O-shaped, aberrant, aberrative, adrift, ambagious,
   antipodean, apart, back of beyond, backhanded, beat,
   beside the mark, beside the point, beside the question,
   beyond reach, beyond the bounds, breakaway, casual, circuitous,
   circular, departing, desultory, detached, deviant, deviating,
   deviative, deviatory, devious, digressive, discursive, distant,
   errant, erratic, excursive, extra, extraneous, extraordinary,
   extrinsic, far out, farfetched, forced, free and easy, fringy,
   godforsaken, helical, heretical, heterodox, hippie, hyperborean,
   immaterial, impertinent, improbable, in a backwater, inaccessible,
   inadmissible, inapplicable, inapposite, inappropriate, incidental,
   inconsequent, indirect, informal, insular, irrelative, irrelevant,
   isolated, kinky, labyrinthine, lonesome, maverick, mazy,
   meandering, more than expected, nihil ad rem, nonessential,
   not at issue, not cricket, not done, not kosher, oblique,
   occasional, odd, off, off the subject, offbeat, orbital, original,
   out of earshot, out of hearing, out of range, out of reach,
   out of sight, out-of-the-world, parenthetical, part-time,
   past expectation, planetary, quarantined, quite another thing,
   rambling, rare, recherche, remote, removed, retired, rotary, round,
   roundabout, roving, secluded, secret, segregated, separate,
   separated, serpentine, shifting, shut off, side, snaky,
   something else again, spare, spiral, strained, stray, sudden,
   sui generis, swerving, turning, twisting, unannounced,
   unanticipated, unapproachable, uncommon, unconventional,
   uncustomary, undirected, undivined, undreamed-of, unessential,
   unexpected, unfamiliar, unfashionable, unforeseeable, unforeseen,
   unfrequented, ungetatable, unguessed, unheard-of, unheralded,
   unhoped for, unique, unordinary, unorthodox, unpredictable,
   unpredicted, unprepared for, unthought-of, untouchable, unusual,
   unvisited, unwonted, vagrant, veering, wandering, way out, winding,
   withdrawn, without warning, zigzag