The Collaborative International Dictionary of English v.0.48:

Tort \Tort\, n. [F., from LL. tortum, fr. L. tortus twisted,
   crooked, p. p. of torqure to twist, bend. See Torture.]
   1. Mischief; injury; calamity. [Obs.]
      [1913 Webster]

            That had them long opprest with tort. --Spenser.
      [1913 Webster]

   2. (Law) Any civil wrong or injury; a wrongful act (not
      involving a breach of contract) for which an action will
      lie; a form of action, in some parts of the United States,
      for a wrong or injury.
      [1913 Webster]

   Executor de son tort. See under Executor.

   Tort feasor (Law), a wrongdoer; a trespasser. --Wharton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tort \Tort\, a.
   Stretched tight; taut. [R.]
   [1913 Webster]

         Yet holds he them with tortest rein.     --Emerson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tort
    n 1: (law) any wrongdoing for which an action for damages may be
         brought [syn: tort, civil wrong]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "tort":
   atrocity, breach, crime, crime against humanity, deadly sin,
   delict, delinquency, dereliction, diablerie, enormity, error, evil,
   failure, fault, felony, genocide, guilty act, heavy sin,
   illegality, impropriety, indiscretion, inexpiable sin, iniquity,
   injury, injustice, lapse, malefaction, malfeasance, malum,
   minor wrong, misdeed, misdemeanor, misfeasance, mortal sin,
   nonfeasance, offense, omission, outrage, peccadillo, peccancy, sin,
   sin of commission, sin of omission, sinful act, slip,
   transgression, trespass, trip, unutterable sin, venial sin,
   violation, wrong, wrongdoing



Bouvier's Law Dictionary, Revised 6th Ed (1856):

TORT. An injury; a wrong; (q.v.) hence the expression an executor de son
tort, of his own wrong. Co. Lit. 158.
     2. Torts may be committed with force, as trespasses, which may be an
injury to the person, such as assault, battery, imprisonment; to the
property in possession; or they may be committed without force. Torts of
this nature are to the absolute or relative rights of persons, or to
personal property in possession or reversion, or to real property, corporeal
or encorporeal, in possession or reversion: these injuries may be either by
nonfeasance, malfeasance, or misfeasance. 1 Chit. Pl. 133-4. Vide 1 Fonb.
Eq. 4; Bouv. Inst. Index, h.t.; and the article Injury.