Disjunction: A truth-functional sentence formed by connecting two sentences by ‘or’; such sentences are true if and only if at least one of their component disjuncts is true.

Source: What is Good? What is Bad? The Value of All Values across Time, Place and Theories’ by John McMurtry, Philosophy and World Problems, Volume I-III, UNESCO in partnership with Encyclopedia of Life Support Systems: Oxford, 2004-11.