The Collaborative International Dictionary of English v.0.48:

Detached \De*tached"\, a.
   Separate; unconnected, or imperfectly connected; as, detached
   parcels. "Extensive and detached empire." --Burke.
   [1913 Webster]

   Detached escapement. See Escapement.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Detach \De*tach"\, v. t. [imp. & p. p. Detached; p. pr. & vb.
   n. Detaching.] [F. d['e]tacher (cf. It. distaccare,
   staccare); pref. d['e] (L. dis) + the root found also in E.
   attach. See Attach, and cf. Staccato.]
   1. To part; to separate or disunite; to disengage; -- the
      opposite of attach; as, to detach the coats of a bulbous
      root from each other; to detach a man from a leader or
      from a party.
      [1913 Webster]

   2. To separate for a special object or use; -- used
      especially in military language; as, to detach a ship from
      a fleet, or a company from a regiment.

   Syn: To separate; disunite; disengage; sever; disjoin;
        withdraw; draw off. See Detail.
        [1913 Webster]

WordNet (r) 3.0 (2006):

detached
    adj 1: showing lack of emotional involvement; "adopted a degage
           pose on the arm of the easy chair"- J.S.Perelman; "she
           may be detached or even unfeeling but at least she's not
           hypocritically effusive"; "an uninvolved bystander" [syn:
           degage, detached, uninvolved]
    2: 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]
    3: 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]
    4: used of buildings; standing apart from others; "detached
       houses"; "a detached garage" [ant: attached]
    5: lacking affection or warm feeling; "an uncaring person" [syn:
       detached, unaffectionate, uncaring]
    6: not fixed in position; "the detached shutter fell on him";
       "he pulled his arm free and ran" [syn: detached, free]

Moby Thesaurus II by Grady Ward, 1.0:

230 Moby Thesaurus words for "detached":
   Laodicean, Olympian, abstract, afoot and lighthearted, alien,
   alienated, alone, aloof, apart, apathetic, at large, at liberty,
   backward, bashful, benumbed, blah, blank, blase, bored, broken,
   candid, careless, casual, chilled, chilly, clear, cold, colorless,
   comatose, companionless, constrained, cool, cut off, desensitized,
   disarticulated, disconnected, discontinuous, discreet, discrete,
   disengaged, disinterested, disjoined, disjoint, disjointed,
   disjunct, dislocated, dispassionate, dispersed, disrelated,
   dissociated, distant, disunited, divided, divorced, dull,
   easygoing, emancipated, equitable, estranged, evenhanded,
   exclusive, exotic, expressionless, extraneous, fair, footloose,
   footloose and fancy-free, forbidding, foreign, free, free and easy,
   free as air, freeborn, freed, friendless, frigid, frosty, gapped,
   go-as-you-please, guarded, heartless, hebetudinous, heedless,
   homeless, hopeless, icy, impartial, impassive, impersonal,
   in a backwater, in a stupor, in the clear, inaccessible,
   incoherent, incommensurable, incomparable, inconsistent, incurious,
   independent, indifferent, insouciant, insular, introverted,
   irrelative, isolate, isolated, just, kithless, languid, lethargic,
   liberated, listless, lofty, lone, lonely, lonesome, loose,
   mindless, modest, neutral, nonadherent, nonadhesive, nonchalant,
   noncoherent, noncohesive, numb, numbed, objective, offish,
   on the loose, open, other, out-of-the-way, out-of-the-world,
   outlandish, passive, phlegmatic, pluckless, poker-faced,
   quarantined, regardless, released, remote, removed, repressed,
   reserved, resigned, restrained, reticent, retired, retiring,
   rootless, scattered, scot-free, secluded, seclusive, segregate,
   segregated, selfless, separate, separated, sequestered, shrinking,
   shut off, single-handed, slack, sluggish, solitary, solo,
   soporific, spiritless, spunkless, standoff, standoffish, stoic,
   stolid, strange, stupefied, subdued, supine, suppressed, tenuous,
   torpid, unabetted, unaccompanied, unadhesive, unaffable,
   unaffiliated, unaided, unallied, unapproachable, unassisted,
   unassociated, unattached, unattended, unbiased, uncaring,
   uncoherent, uncohesive, uncommitted, unconcerned, uncongenial,
   unconnected, undazzled, undemonstrative, unemotional, unengaged,
   unescorted, unexpansive, unfastened, unfrequented, ungenial,
   uninfluenced, uninquiring, uninterested, uninvolved, unjaundiced,
   unjoined, unmindful, unprejudiced, unprepossessed, unrelatable,
   unrelated, unseconded, unselfish, unsupported, unswayed,
   untenacious, unvisited, withdrawn