Source : Webster's Revised Unabridged Dictionary (1913)

Singularly \Sin"gu*lar*ly\, adv.
   1. In a singular manner; in a manner, or to a degree, not
      common to others; extraordinarily; as, to be singularly
      exact in one's statements; singularly considerate of
      others. ``Singularly handsome.'' --Milman.

   2. Strangely; oddly; as, to behave singularly.

   3. So as to express one, or the singular number.

Source : WordNet®

singularly
     adv : in a singular manner or to a singular degree; "Lord T. was
           considered singularly licentious even for the courts of
           Russia and Portugal; he acquired three wives and
           fourteen children during his Portuguese embassy alone"