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The Collaborative International Dictionary of English v.0.48 (gcide)

Disjunctive \Dis*junc"tive\, n.
(a) (Gram.) A disjunctive conjunction.
(b) (Logic) A disjunctive proposition.
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Disjunctive \Dis*junc"tive\, a. [L. disjunctivus: cf. F.
disjonctif.]
1. Tending to disjoin; separating; disjoining.
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2. (Mus.) Pertaining to disjunct tetrachords. "Disjunctive
notes." --Moore (Encyc. of Music).
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{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}, a proposition in which the parts
are connected by disjunctive conjunctions, specifying that
one of two or more propositions may hold, but that no two
propositions may hold at the same time; 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.
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