dəs, (ˈ)dis+ noun
Etymology: Middle English disjunccioun, from Latin disjunction-, disjunctio, from disjunctus + -ion-, -io -ion
1. : the act of disjoining or state of being disjoined : disunion , separation , parting
the disjunction of soul and body
2. : the relation of the terms or clauses of a logical proposition or judgment expressing alternatives ; also : a statement of such a proposition usually taking the form (1) p v q meaning p or q or both or (2) p + q meaning p or q but not both — called also respectively (1) inclusive disjunction, (2) exclusive disjunction
3. : an area of discontinuity between areas in which populations of a specified organism are present