contrary

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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
References in periodicals archive ?
In this chapter, Aristotle calls the neutral state of being neither of two contraries in a thing that is receptive of those contraries a privative negation' ([TEXT NOT REPRODUCIBLE IN ASCII]).
Contraries Abbreviated is an exceptional collection of songs, by a creative and skilled vocalist.