disjunctive

adjective

1. serving or tending to disjoin; separating; dividing; distinguishing.
2. Grammar.
   1. syntactically setting two or more expressions in opposition to each other, as but in poor but happy, or expressing an alternative, as or in this or that.
   2. not syntactically dependent upon some particular expression.
3. Logic.
   1. characterizing propositions that are disjunctions.
   2. (of a syllogism) containing at least one disjunctive proposition as a premise.

noun

4. a statement, course of action, etc., involving alternatives.
5. Logic. disjunction(def 2a).
6. Grammar. a disjunctive word.

adjective

1. serving to disconnect or separate
2. grammar
   1. denoting a word, esp a conjunction, that serves to express opposition or contrast: but in the sentence She was poor but she was honest
   2. denoting an inflection of pronouns in some languages that is used alone or after a preposition, such as moi in French
3. Also: alternative logic relating to, characterized by, or containing disjunction

noun

4. grammar
   1. a disjunctive word, esp a conjunction
   2. a disjunctive pronoun
5. logic a disjunctive proposition; disjunction