D defs.my
Entry 2 senses Webster, 1913

Contradiction

/känˌ-trəd-ĭk'-shən/ · Con·tra·dic·tion · IPA /ˌkɑːntɹəˈdɪkʃən/
01 n. An assertion of the contrary to what has been said or affirmed; denial of the truth of a statement or assertion; contrary declaration; gain…
  1. 1.
    An assertion of the contrary to what has been said or affirmed; denial of the truth of a statement or assertion; contrary declaration; gainsaying.
    “His fair demands Shall be accomplished without contradiction.” Shak.
  2. 2.
    Direct opposition or repugnancy; inconsistency; incongruity or contrariety; one who, or that which, is inconsistent.
    “can he make deathless death? That were to make Strange contradiction.” Milton.
    “We state our experience and then we come to a manly resolution of acting in contradiction to it.” Burke.
    “Both parts of a contradiction can not possibly be true.” — Hobbes.
    “Of contradictions infinite the slave.” Wordsworth.
Phrases & compounds
Principle of contradiction — the axiom or law of thought that a thing cannot be and not be at the same time, or a thing must either be or not be, or the same attribute can not at the same time be affirmed and and denied of the same subject; also called the law of the excluded middle.