Dictionary
dis•junc•tion
Pronunciation: (dis-jungk'shun), [key]—
n.
1. the act of disjoining or the state of being disjoined:
a disjunction between thought and action.
2. Logic.
a. Also called disjunctive, inclusive disjunction. a compound proposition that is true if and only if at least one of a number of alternatives is true.
b. Also called exclusive disjunction. a compound proposition that is true if and only if one and only one of a number of alternatives is true.
c. the relation among the components of such a proposition, usually expressed by AND or V.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.