The Collaborative International Dictionary of English v.0.48:

Violation \Vi`o*la"tion\, n. [L. violatio: cf. F. violation.]
   The act of violating, treating with violence, or injuring;
   the state of being violated. Specifically:
   [1913 Webster]
   (a) Infringement; transgression; nonobservance; as, the
       violation of law or positive command, of covenants,
       promises, etc. "The violation of my faith." --Shak.
       [1913 Webster]
   (b) An act of irreverence or desecration; profanation or
       contemptuous treatment of sacred things; as, the
       violation of a church. --Udall.
       [1913 Webster]
   (c) Interruption, as of sleep or peace; disturbance.
       [1913 Webster]
   (d) Ravishment; rape; outrage. --Shak.
       [1913 Webster]

WordNet (r) 3.0 (2006):

violation
    n 1: a crime less serious than a felony [syn: misdemeanor,
         misdemeanour, infraction, violation, infringement]
    2: an act that disregards an agreement or a right; "he claimed a
       violation of his rights under the Fifth Amendment" [syn:
       violation, infringement]
    3: entry to another's property without right or permission [syn:
       trespass, encroachment, violation, intrusion,
       usurpation]
    4: a disrespectful act [syn: irreverence, violation]
    5: the crime of forcing a woman to submit to sexual intercourse
       against her will [syn: rape, violation, assault,
       ravishment]

Moby Thesaurus II by Grady Ward, 1.0:

171 Moby Thesaurus words for "violation":
   aberrance, aberrancy, abnormality, abomination, abuse,
   abuse of office, abusing, assault, atrocity, attack, bad faith,
   battering, befoulment, betrayal, blasphemy, breach,
   breach of contract, breach of faith, breach of privilege,
   breach of promise, breach of trust, break, breaking, butchery,
   civil disobedience, contravention, conversion,
   corrupt administration, crime, criminal assault, criminality,
   debasement, debasing, debauchment, defacement, defalcation,
   defilement, defiling, defloration, deflowering, deflowerment,
   degradation, degrading, delict, delinquency, desecrating,
   desecration, despoilment, deviance, deviancy, devirgination,
   disgrace, dishonor, dishonoring, disobedience, disorderliness,
   disregard, diversion, embezzlement, encroachment, felony,
   forcible seizure, fouling, frowardness, ignominy, ignoring,
   ill-treatment, ill-usage, ill-use, illegality, improperness,
   impropriety, inappropriateness, incorrectness, indecorousness,
   indecorum, indiscipline, indocility, infamy, infraction,
   infringement, infringing, injury, insubordination, intractability,
   killing, lawbreaking, lawlessness, laying waste, looting,
   maladministration, malfeasance, malpractice, maltreatment,
   malversation, massacre, misapplication, misappropriation,
   misconduct, misdemeanor, misemployment, misfeasance, mishandling,
   mismanagement, mistreatment, misusage, misuse, molestation,
   naughtiness, noncompliance, nonconformity, noncooperation,
   nonobedience, obstreperousness, offense, onslaught, outrage,
   passive resistance, peculation, perversion, pilfering, pillaging,
   pity, pollution, poor stewardship, priapism, profanation,
   profaning, prostitution, rape, ravage, ravishment, recusancy, riot,
   rioting, sacking, sacrilege, scandal, seducement, seduction,
   sexual assault, sexual possession, shame, sinfulness, slaughter,
   sowing with salt, taking, terrible thing, tort, transgression,
   trespass, uncooperativeness, unduteousness, undutifulness,
   unfitness, unfittingness, unlawfulness, unrighteousness,
   unruliness, unseemliness, unsubmissiveness, unsuitability,
   violating, violence, waywardness, wickedness, willful disobedience,
   wrong, wrongdoing, wrongfulness, wrongness



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

VIOLATION. An act done unlawfully and with force. In the English stat. of 25
E. III., st. 5, c. 2, it is declared to be high treason in any person who
shall violate the king's companion; and it is equally high treason in her to
suffer willingly such violation. This word has been construed under this
statute to mean carnal knowledge. 3 Inst. 9; Bac. Ab, Treason, E.