Source : Webster's Revised Unabridged Dictionary (1913)

Clumsiness \Clum"si*ness\, n.
   The quality of being clumsy.

         The drudging part of life is chiefly owing to
         clumsiness and ignorance.                --Collier.

Source : WordNet®

clumsiness
     n 1: unskillfulness resulting from a lack of training [syn: {awkwardness},
           {ineptness}, {ineptitude}, {maladroitness}, {slowness}]
     2: the carriage of someone whose movements and posture are
        ungainly or inelegant [syn: {awkwardness}] [ant: {gracefulness}]
     3: the inelegance of someone stiff and unrelaxed (as by
        embarrassment) [syn: {awkwardness}, {gracelessness}, {stiffness}]