Either of a pair of propositions, that cannot both be true or both be false.
That contradicts something, such as an argument.
That is diametrically opposed to something.
That is itself a contradiction.
Mutually exclusive.
Tending to contradict or oppose, contrarious.
The left-hand page of a book of a script which reads from left to right, usually having an even page number.
The back side of a flat object which is to be examined visually, as for reading, such as a sheet, leaf, coin or medal;