The Collaborative International Dictionary of English v.0.48:

Separate \Sep"a*rate\, v. t. [imp. & p. p. Separated; p. pr. &
   vb. n. Separating.] [L. separatus, p. p. of separare to
   separate; pfref. se- aside + parare to make ready, prepare.
   See Parade, and cf. Sever.]
   1. To disunite; to divide; to disconnect; to sever; to part
      in any manner.
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            From the fine gold I separate the alloy. --Dryden.
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            Separate thyself, I pray thee, from me. --Gen. xiii.
                                                  9.
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            Who shall separate us from the love of Christ?
                                                  --Rom. viii.
                                                  35.
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   2. To come between; to keep apart by occupying the space
      between; to lie between; as, the Mediterranean Sea
      separates Europe and Africa.
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   3. To set apart; to select from among others, as for a
      special use or service.
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            Separate me Barnabas and Saul for the work whereunto
            I have called thaem.                  --Acts xiii.
                                                  2.
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   Separated flowers (Bot.), flowers which have stamens and
      pistils in separate flowers; diclinous flowers. --Gray.
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WordNet (r) 3.0 (2006):

separated
    adj 1: being or feeling set or kept apart from others; "she felt
           detached from the group"; "could not remain the isolated
           figure he had been"- Sherwood Anderson; "thought of
           herself as alone and separated from the others"; "had a
           set-apart feeling" [syn: detached, isolated,
           separated, set-apart]
    2: spaced apart [syn: separated, spaced]
    3: separated at the joint; "a dislocated knee"; "a separated
       shoulder" [syn: disjointed, dislocated, separated]
    4: no longer connected or joined; "a detached part"; "on one
       side of the island was a hugh rock, almost detached"; "the
       separated spacecraft will return to their home bases" [syn:
       detached, separated]

Moby Thesaurus II by Grady Ward, 1.0:

158 Moby Thesaurus words for "separated":
   alien, alienated, alone, aloof, apart, assorted, asunder,
   at a distance, at odds, at variance, away, companionless, contrary,
   contrasted, contrasting, cordoned, cordoned off, departing,
   detached, deviating, deviative, different, differentiated,
   differing, disaccordant, disaffected, disagreeing, disarticulated,
   disconnected, discordant, discrepant, discrete, discriminated,
   disengaged, disjoined, disjoint, disjointed, disjunct, dislocated,
   disparate, dispersed, disrelated, dissimilar, dissociated,
   dissonant, distal, distant, distinct, distinguished, disunited,
   divergent, diverging, divers, diverse, diversified, divided,
   divorced, estranged, exotic, extraneous, far, far off, faraway,
   foreign, friendless, heterogeneous, homeless, in a backwater,
   in disagreement, inaccordant, incommensurable, incomparable,
   incompatible, incongruous, inconsistent, inconsonant, independent,
   inharmonious, insular, interspaced, intervaled, irreconcilable,
   irrelative, isolated, kithless, legally separated, lone, lonely,
   lonesome, long-distance, long-range, many, motley, multifarious,
   other, out-of-the-way, out-of-the-world, outlandish, parted,
   poles apart, poles asunder, quarantined, remote, removed, retired,
   rootless, roped off, scattered, sealed off, secluded, segregate,
   segregated, separate, sequestered, set at intervals, several,
   shut off, single-handed, solitary, solo, spaced, spaced out,
   strange, torn, unabetted, unaccompanied, unaffiliated, unaided,
   unallied, unassisted, unassociated, unattended, unconformable,
   unconnected, unequal, unescorted, unfrequented, unlike,
   unrelatable, unrelated, unseconded, unsupported, unvisited,
   variant, varied, variegated, various, varying, widely apart,
   widowed, widowered, widowish, widowlike, widowly, with an interval,
   with intervals, withdrawn, worlds apart