adj

• (grammar, of a personal pronoun) Not used in immediate conjunction with the verb of which the pronoun is the subject.
• (grammar, of a conjunction) Tending to join (two clauses), but in a way that conveys a disjunct within the conjoined relationship.
  "The words "but" and "or" are disjunctive conjunctions."
• (music) Relating to disjunct tetrachords.
  "[…] that the phrase should be articulated in one breath; failing this, Quantz recommends that breath should be taken wherever possible on tied notes, between disjunctive notes of continuous semiquavers or at other equivalent moments."
• (logic) Of or related to a disjunction.
  "An opposition of contrariety is not of purely logical concernment; and a disjunctive syllogism with characters opposed in contrariety, in fact, consists of as many pure disjunctive syllogisms as there are opposing predicates."

noun

• (logic) A disjunction.
  "L. H. Atwater Disjunctives may be turned into conditionals."
• (grammar) A disjunct.