Source : Webster's Revised Unabridged Dictionary (1913)

Whimper \Whim"per\, v. i. [imp. & p. p. {Whimpered}; p. pr. &
   vb. n. {Whimpering}.] [Cf. Scot. whimmer, G. wimmern.]
   To cry with a low, whining, broken voice; to whine; to
   complain; as, a child whimpers.

         Was there ever yet preacher but there were gainsayers
         that spurned, that winced, that whimpered against him?
                                                  --Latimer.

Whimper \Whim"per\, v. t.
   To utter in alow, whining tone.

Whimper \Whim"per\, n.
   A low, whining, broken cry; a low, whining sound, expressive
   of complaint or grief.

Source : WordNet®

whimper
     n : a complaint uttered in a plaintive whining way [syn: {whine}]
     v : cry weakly or softly; "she wailed with pain" [syn: {wail}, {mewl},
          {pule}]