Definitions of justification:

  • noun:   the act of defending or explaining or making excuses for by reasoning
    Example: "The justification of barbarous means by holy ends- H.J.Muller"
  • noun:   something (such as a fact or circumstance) that shows an action to be reasonable or necessary
    Example: "He considered misrule a justification for revolution"
  • noun:   a statement in explanation of some action or belief