1.The quality or state of being inconsistent; discordance in respect to sentiment or action; such contrariety between two things that both can not exist or be true together; disagreement; incompatibility. "There is a perfect inconsistency between that which is of debt and that which is of free gift."
2.Absurdity in argument ore narration; incoherence or irreconcilability in the parts of a statement, argument, or narration; that which is inconsistent. "If a man would register all his opinions upon love, politics, religion, and learning, what a bundle of inconsistencies and contradictions would appear at last!"
3.Lack of stability or uniformity; unsteadiness; changeableness; variableness. "Mutability of temper, and inconsistency with ourselves, is the greatest weakness of human nature."