Source : Webster's Revised Unabridged Dictionary (1913)

Truncate \Trun"cate\, v. t. [imp. & p. p. {Truncated}; p. pr. &
   vb. n. {Truncating}.] [L. truncatus, p. p. of truncare to cut
   off, mutilate, fr. truncus maimed, mutilated, cut short. See
   {Trunk}.]
   To cut off; to lop; to maim.