Source : Webster's Revised Unabridged Dictionary (1913)

Disjunctive \Dis*junc"tive\, a. [L. disjunctivus: cf. F.
   disjonctif.]
   1. Tending to disjoin; separating; disjoining.

   2. (Mus.) Pertaining to disjunct tetrachords. ``Disjunctive
      notes.'' --Moore (Encyc. of Music).

   {Disjunctive conjunction} (Gram.), one connecting
      grammatically two words or clauses, expressing at the same
      time an opposition or separation inherent in the notions
      or thoughts; as, either, or, neither, nor, but, although,
      except, lest, etc.

   {Disjunctive proposition}, one in which the parts are
      connected by disjunctive conjunctions; as it is either day
      or night.

   {Disjunctive syllogism} (Logic), one in which the major
      proposition is disjunctive; as, the earth moves in a
      circle or an ellipse; but in does not move in a circle,
      therefore it moves in an ellipse.