call-by-reference <programming> An {argument} passing convention where the address of an argument {variable} is passed to a {function} or {procedure}, as opposed to passing the value of the argument expression. Execution of the function or procedure may have {side-effects} on the actual argument as seen by the caller. The {C} language's "&" (address of) and "*" (dereference) operators allow the programmer to code explicit call-by-reference. Other languages provide special syntax to declare reference arguments (e.g. {ALGOL 60}). See also {call-by-name}, {call-by-value}, {call-by-value-result}. (2006-05-27)