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]