contrary

(redirected from by contraries)
Also found in: Dictionary, Thesaurus, Legal, Idioms.

contrary

1. (esp of wind) adverse; unfavourable
2. (of plant parts) situated at right angles to each other
3. Logic (of a pair of propositions) related so that they cannot both be true at once, although they may both be false together
4. Logic a statement that cannot be true when a given statement is true