The Collaborative International Dictionary of English v.0.48:

Marked \Marked\ (m[aum]rkt), a.
   Designated or distinguished by, or as by, a mark; hence;
   noticeable; conspicuous; as, a marked card; a marked coin; a
   marked instance. -- Mark"ed*ly, adv. --J. S. Mill.
   [1913 Webster]

   A marked man, a man who is noted by a community, or by a
      part of it, as, for excellence or depravity; -- usually
      with an unfavorable suggestion.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mark \Mark\ (m[aum]rk), v. t. [imp. & p. p. Marked
   (m[aum]rkt); p. pr. & vb. n. Marking.] [OE. marken, merken,
   AS. mearcian, from mearc. See Mark the sign.]
   1. To put a mark upon; to affix a significant mark to; to
      make recognizable by a mark; as, to mark a box or bale of
      merchandise; to mark clothing.
      [1913 Webster]

   2. To be a mark upon; to designate; to indicate; -- used
      literally and figuratively; as, this monument marks the
      spot where Wolfe died; his courage and energy marked him
      for a leader.
      [1913 Webster]

   3. To leave a trace, scratch, scar, or other mark, upon, or
      any evidence of action; as, a pencil marks paper; his
      hobnails marked the floor.
      [1913 Webster]

   4. To keep account of; to enumerate and register; as, to mark
      the points in a game of billiards or cards.
      [1913 Webster]

   5. To notice or observe; to give attention to; to take note
      of; to remark; to heed; to regard; as, mark my words.
      "Mark the perfect man." --Ps. xxxvii. 37.
      [1913 Webster]

   To mark out.
      (a) To designate, as by a mark; to select; as, the
          ringleaders were marked out for punishment.
      (b) To obliterate or cancel with a mark; as, to mark out
          an item in an account.

   To mark time (Mil.), to keep the time of a marching step by
      moving the legs alternately without advancing.
      [1913 Webster]

   Syn: To note; remark; notice; observe; regard; heed; show;
        evince; indicate; point out; betoken; denote;
        characterize; stamp; imprint; impress; brand.
        [1913 Webster]

WordNet (r) 3.0 (2006):

marked
    adj 1: strongly marked; easily noticeable; "walked with a marked
           limp"; "a pronounced flavor of cinnamon" [syn: marked,
           pronounced]
    2: singled out for notice or especially for a dire fate; "a
       marked man"
    3: having or as if having an identifying mark or a mark as
       specified; often used in combination; "played with marked
       cards"; "a scar-marked face"; "well-marked roads" [ant:
       unmarked]

Moby Thesaurus II by Grady Ward, 1.0:

142 Moby Thesaurus words for "marked":
   a cut above, above, acclaimed, ahead, appalling, apparent,
   appointed, appropriate, arresting, ascendant, astonishing, better,
   capping, carved, celebrated, characteristic, chosen, considerable,
   conspicuous, creased, cut, decided, destined, devoted, distinctive,
   distinguished, doomed, eclipsing, egregious, eminent, enchased,
   engraved, esteemed, estimable, evident, exceeding, excellent,
   excelling, exceptional, extraordinary, fabled, fabulous, famed,
   famous, fantastic, far-famed, far-heard, fatal, fated, fateful,
   finer, foredoomed, formidable, furrowed, glyphic, graved, graven,
   greater, grooved, higher, honored, idiocratic, idiosyncratic,
   impressed, imprinted, in ascendancy, in character, in store,
   in the ascendant, in the cards, incised, incredible, inevitable,
   inscribed, insculptured, intrinsic, legendary, lined, major,
   marvelous, memorable, much acclaimed, mythical, noble, notable,
   noted, noteworthy, noticeable, notorious, obvious, of choice,
   of mark, of note, one up on, ordained, outstanding, over, patent,
   peculiar, pointed, popular, prestigious, printed, prominent,
   pronounced, proper, quintessential, rare, remarkable, rememberable,
   renowned, reputable, rivaling, salient, sculptured, signal,
   significant, single, singular, special, stamped, striking, super,
   superior, surpassing, talked-about, talked-of, telling, tooled,
   topping, transcendent, transcendental, transcending, true to form,
   uncommon, unforgettable, unique, unmistakable, upper, well-known,
   wonderful, written