The Collaborative International Dictionary of English v.0.48:

Lasher \Lash"er\, n.
   1. A piece of rope for binding or making fast one thing to
      another; -- called also lashing.
      [1913 Webster]

   2. A weir in a river. [Eng.] --Halliwell.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lashing \Lash"ing\, n.
   The act of one who, or that which, lashes; castigation;
   chastisement. --South.
   [1913 Webster]

   Lashing out, a striking out; also, extravagance.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lashing \Lash"ing\, n.
   See 2d Lasher.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lashing
    adj 1: violently urging on by whipping or flogging; "looked at
           the lashing riders"
    n 1: beating with a whip or strap or rope as a form of
         punishment [syn: whipping, tanning, flogging,
         lashing, flagellation]
    2: rope that is used for fastening something to something else;
       "the boats were held together by lashings"

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "lashing":
   adhesive, affixation, annexation, attachment, bastinado, basting,
   battery, beating, belting, binding, bond, buffeting, caning,
   clasping, clubbing, corporal punishment, cowhiding, cudgeling,
   drubbing, fastener, fastening, flagellation, flailing, flogging,
   fustigation, girding, hooking, horsewhipping, knot, lacing,
   ligation, pistol-whipping, rawhiding, scourging, spanking, splice,
   sticking, strapping, stripes, swingeing, switching, thrashing,
   tieing, trouncing, truncheoning, whipping, zipping