contrary (Noun) — A relation of direct opposition.
contrary (Noun) — Exact opposition. ex. "public opinion to the contrary he is not guilty"
contrary (Noun) — A logical relation such that two propositions are contraries if both cannot be true but both can be false.
contrary (Adjective) — Very opposed in nature, character or purpose. ex. "acts contrary to our code of ethics" ex. "the facts point to a contrary conclusion"
contrary (Adjective) — Of words or propositions so related that both cannot be true but both may be false. ex. "'hot' and 'cold' are contrary terms"
contrary (Adjective) — In an opposing direction. ex. "a contrary wind"
contrary (Adjective) — Resistant to guidance or discipline; tending to do the opposite of what is normal or wanted. ex. "Mary Mary quite contrary"