Source : Webster's Revised Unabridged Dictionary (1913)

Hesitation \Hes`i*ta"tion\, n. [L. haesitatio: cf. F.
   h['e]sitation.]
   1. The act of hesitating; suspension of opinion or action;
      doubt; vacillation.

   2. A faltering in speech; stammering. --Swift.

Source : WordNet®

hesitation
     n 1: indecision in speech or action [syn: {vacillation}, {wavering}]
     2: a certain degree of unwillingness; "a reluctance to commit
        himself"; "after some hesitation he agreed" [syn: {reluctance},
         {hesitancy}, {disinclination}, {indisposition}]
     3: the act of pausing uncertainly; "there was a hesitation in
        his speech" [syn: {waver}, {falter}, {faltering}]