Source : Webster's Revised Unabridged Dictionary (1913)

Trespass \Tres"pass\, v. i. [imp. & p. p. {Trespassed}; p. pr. &
   vb. n. {Trespassing}.] [{OF}. trespasser to go across or
   over, transgress, F. tr['e]passer to die; pref. tres- (L.
   trans across, over) + passer to pass. See {Pass}, v. i., and
   cf. {Transpass}.]
   1. To pass beyond a limit or boundary; hence, to depart; to
      go. [Obs.]

            Soon after this, noble Robert de Bruce . . .
            trespassed out of this uncertain world. --Ld.
                                                  Berners.

   2. (Law) To commit a trespass; esp., to enter unlawfully upon
      the land of another.

   3. To go too far; to put any one to inconvenience by demand
      or importunity; to intrude; as, to trespass upon the time
      or patience of another.

   4. To commit any offense, or to do any act that injures or
      annoys another; to violate any rule of rectitude, to the
      injury of another; hence, in a moral sense, to transgress
      voluntarily any divine law or command; to violate any
      known rule of duty; to sin; -- often followed by against.

            In the time of his distress did he trespass yet more
            against the Lord.                     --2 Chron.
                                                  xxviii. 22.

Trespass \Tres"pass\, n. [OF. trespas, F. tr['e]pas death. See
   {Trespass}, v.]
   1. Any injury or offence done to another.

            I you forgive all wholly this trespass. --Chaucer.

            If ye forgive not men their trespasses, neither will
            your Father forgive your trespasses.  --Matt. vi.
                                                  15.

   2. Any voluntary transgression of the moral law; any
      violation of a known rule of duty; sin.

            The fatal trespass done by Eve.       --Milton.

            You . . . who were dead in trespasses and sins.
                                                  --Eph. if. 1.

   3. (Law)
      (a) An unlawful act committed with force and violence (vi
          et armis) on the person, property, or relative rights
          of another.
      (b) An action for injuries accompanied with force.

   {Trespass offering} (Jewish Antiq.), an offering in expiation
      of a trespass.

   {Trespass on the case}. (Law) See {Action on the case}, under
      {Case}.

   Syn: Offense; breach; infringement; transgression;
        misdemeanor; misdeed.

Source : WordNet®

trespass
     v 1: enter unlawfully on someone's property; "Don't trespass on
          my land!" [syn: {intrude}]
     2: make excessive use of; "You are taking advantage of my good
        will!"; "She is trespassing upon my privacy" [syn: {take
        advantage}]
     3: break the law
     4: commit a sin; violate a law of God or a moral law [syn: {sin},
         {transgress}]
     5: pass beyond (limits or boundaries) [syn: {transgress}, {overstep}]

trespass
     n 1: a wrongful interference with the possession of property
          (personal property as well as realty), or the action
          instituted to recover damages
     2: entry to another's property without right or permission
        [syn: {encroachment}, {violation}, {intrusion}, {usurpation}]