Serving or tending to disjoin; separating; dividing; distinguishing: as, a disjunctive conjunction.Incapable of joining or uniting.Comprising or marked by a disjunction or separation of parts.In music, pertaining to disjunct tetrachords: as, a disjunctive intervaln. In grammar, a word that disjoins; a disjunctive conjunction, as or, nor, neither.n. In logic, a disjunctive proposition.