Meaning

• To deny the truth of (a statement or statements).

  "His testimony contradicts hers."

• To deny the truth of the statement(s) made by (a person).

  "Everything he says contradicts me."

• To be contrary to (something).

• To give an order contrary to (another order or wish), oppose (something).

• To give an order contrary to one given by (another person), oppose or resist (someone).

• To speak against; to forbid.