The Collaborative International Dictionary of English v.0.48:

Queer \Queer\ (kw[=e]r), a. [Compar. Queerer (kw[=e]r"[~e]r);
   superl. Queerest.] [G. quer cross, oblique, athwart (cf.
   querkopf a queer fellow), OHG. twer, twerh, dwerah; akin to
   D. dvars, AS, [thorn]weorh thwart, bent, twisted, Icel.
   [thorn]verr thwart, transverse, Goth. [thorn]wa[`i]rhs angry,
   and perh. to L. torqyere to twist, and E. through. Cf.
   Torture, Through, Thwart, a.]
   1. At variance with what is usual or normal; differing in
      some odd way from what is ordinary; odd; singular;
      strange; whimsical; as, a queer story or act. " A queer
      look." --W. Irving.
      [1913 Webster]

   2. Mysterious; suspicious; questionable; as, a queer
      transaction. [Colloq.]
      [1913 Webster]

   3. homosexual. [disparaging and offensive]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Queer \Queer\, n.
   1. Counterfeit money. [Slang]
      [1913 Webster]

   2. a homosexual. [disparaging and offensive]
      [PJC]

   To shove the queer, to put counterfeit money in
      circulation. [Slang]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Queer \Queer\ (kw[=e]r), v. t. [From Queer, a.]
   1. To puzzle. [Prov. Eng. or Slang]
      [Webster 1913 Suppl.]

   2. To ridicule; to banter; to rally. [Slang]
      [Webster 1913 Suppl.]

   3. To spoil the effect or success of, as by ridicule; to
      throw a wet blanket on; to spoil. [Slang]
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

queer
    adj 1: beyond or deviating from the usual or expected; "a
           curious hybrid accent"; "her speech has a funny twang";
           "they have some funny ideas about war"; "had an odd
           name"; "the peculiar aromatic odor of cloves"; "something
           definitely queer about this town"; "what a rum fellow";
           "singular behavior" [syn: curious, funny, odd,
           peculiar, queer, rum, rummy, singular]
    2: homosexual or arousing homosexual desires [syn: gay,
       queer, homophile(a)]
    n 1: offensive term for an openly homosexual man [syn: fagot,
         faggot, fag, fairy, nance, pansy, queen,
         queer, poof, poove, pouf]
    v 1: hinder or prevent (the efforts, plans, or desires) of;
         "What ultimately frustrated every challenger was Ruth's
         amazing September surge"; "foil your opponent" [syn:
         thwart, queer, spoil, scotch, foil, cross,
         frustrate, baffle, bilk]
    2: put in a dangerous, disadvantageous, or difficult position
       [syn: queer, expose, scupper, endanger, peril]