o·ver·flow 
(ō′vər-flō)
(ō′vər-flō)v. o·ver·flowed, o·ver·flow·ing, o·ver·flows
v.intr.
1. To flow or run over the top, brim, or banks: The river overflowed and flooded surrounding neighborhoods.
2. To be filled beyond capacity, as a container or waterway.
3. To have a boundless supply; be superabundant. See Synonyms at teem1.
v.tr.
1. To flow over the top, brim, or banks of.
2. To spread or cover over; flood.
3. To cause to fill beyond capacity.
n. (ōvər-flō′)
1. The act of overflowing.
2. Something that flows over; an excess.
3. An outlet or vent through which excess liquid may escape.
4. Computers A condition in which a calculation produces a unit of data too large to be stored in the location allotted to it.