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".