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.

Truncated \Trun"ca*ted\, a.
   1. Cut off; cut short; maimed.

   2. (Min.) Replaced, or cut off, by a plane, especially when
      equally inclined to the adjoining faces; as, a truncated
      edge.

   3. (Zo["o]l.) Lacking the apex; -- said of certain spiral
      shells in which the apex naturally drops off.

   {Truncated cone} or {pyramid} (Geom.), a cone or pyramid
      whose vertex is cut off by a plane, the plane being
      usually parallel to the base.

Source : WordNet®

truncated
     adj 1: cut short in duration; "the abbreviated speech"; "a
            curtailed visit"; "her shortened life was clearly the
            result of smoking"; "an unsatisfactory truncated
            conversation" [syn: {abbreviated}, {shortened}]
     2: terminating abruptly by having or as if having an end or
        point cut off; "a truncate leaf"; "truncated volcanic
        mountains"; "a truncated pyramid" [syn: {truncate}]