1. A flag on some processORs indicating an attempt to calculate a result too large fOR the destination register to hold. 2. MORe generally, an indication of any kind of capacity overload condition. "Well, the Ada description was baroque all right, but I could hack it OK until they got to the exception handling ... that set my overflow bit." 3. The hypothetical bit that will be set if a hacker doesn' t get to make a trip to the Room of PORcelain Fixtures: "I' d better process an internal interrupt befORe the overflow bit gets set". [Jargon File]