INCONSIST'ENT, a. Incompatible; incongruous; not suitable. Loud laughter in grave company is inconsistent with good breeding. Habitual gloom is inconsistent with health and happiness.1. Not consistent; contrary, so that one infers the negation or destruction of the other; or so that the truth of one proves the other to be false. Two covenants, one that a man shall have an estate in fee, and the other that he shall hold it for years, are inconsistent.2. Not uniform; being contrary at different times. Men are sometimes inconsistent with themselves.