[1] : The Collaborative International Dictionary of English v.0.48

underhand \un"derhand`\ u^n"d~erha^nd`, a.
   1. secret; clandestine; hence, mean; unfair; fraudulent.
      --addison.
      1913 webster

   2. baseball, cricket, etc. done, as pitching, with the hand
      lower than the shoulder, or, as bowling, with the hand
      lower than the elbow.
      1913 webster

[2] : The Collaborative International Dictionary of English v.0.48

underhand \un"derhand`\ u^n"d~erha^nd`, adv.
   1. by secret means; in a clandestine manner; hence, by fraud;
      unfairly; dishonorably.
      1913 webster

            such mean revenge, committed underhand. --dryden.
      1913 webster

            baillie macwheeble provided janet, underhand, with
            meal for their maintenance.           --sir w.
                                                  scott.
      1913 webster

   note: in modern usage, the sense is usually negative.
         pjc

   2. baseball, cricket, etc. in an underhand manner; thrown
      with the hand no higher than the shoulder and the palm
      turned upward during part of the pitch; -- said of
      pitching or bowling a ball.
      1913 webster +pjc

[3] : WordNet (r) 2.0

underhand
     adj 1: with hand brought forward and up from below shoulder level;
            "an underhand pitch"; "an underhand stroke" syn: underhanded,
             underarm ant: overhand
     2: marked by deception; "achieved success in business only by
        underhand methods" syn: sneaky, underhanded
     adv 1: slyly and secretly; "mean revenge, committed underhand"-
            john donne; "oldline aristocratic diplomats
            underhandedly undermined the attempt...to align
            germany with the western democracies"- c.g.bowers
            syn: underhandedly
     2: with the hand swung below shoulder level'; "throwing a ball
        underarm" syn: underarm
see also:
underhanded underarm overhand sneaky underhandedly 

[4] : Moby Thesaurus II by Grady Ward, 1.0

20 moby thesaurus words for "underhand":
   crafty, crooked, cunning, deceitful, devious, dishonest,
   duplicitous, furtive, guileful, hangdog, indirect, insidious,
   oblique, shifty, sly, sneaking, sneaky, tricky, underhanded,
   wily

Underhand >> U Words
Underhand, definition of term: Underhand
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