from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Logic A proposition related to another in such a way that both may be true, but both cannot be false.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Either of a pair of propositions at least one of which must be true

from the GNU version of the Collaborative International Dictionary of English

  • adj. Contrary in an inferior degree.
  • adj. Having, or being in, a contrary order; -- said of a section of an oblique cone having a circular base made by a plane not parallel to the base, but so inclined to the axis that the section is a circle; applied also to two similar triangles when so placed as to have a common angle at the vertex, the opposite sides not being parallel.
  • adj. Denoting the relation of opposition between the particular affirmative and particular negative. Of these both may be true and only one can be false.
  • n. A subcontrary proposition; a proposition inferior or contrary in a lower degree.

from The Century Dictionary and Cyclopedia

  • Contrary in an inferior degree.
  • n. In logic, a subcontrary proposition.


Sorry, no etymologies found.



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