Disjunction

Disjunction is the combination of two sentences with or. In propositional logic, the disjunction of two formulas phi and psi, written phi v psi, is true if phi is true or psi is true or both, as is shown in the truth-table (i):

(i) phi		psi	phi v psi 1			 1	   1       1			 0	    1       0			 1	    1       0			 0	    0

This version of disjunction is called inclusive, because it allows the propositions phi and psi both to be true. Natural language or can also be used exclusively: only one of the two propositions may be true, but not both (either ... or ...).

Link
Utrecht Lexicon of Linguistics