- overrun [ō΄vər run′; ] also, and for n.always, [ō′vər run΄]vt.overran, overrun, overrunning1. to run or spread out over so as to cover2. to infest or swarm over, as vermin, or rove over and ravage, as an invading army3. to invade, defeat, or conquer by a rapid, broad advance4. to spread swiftly throughout, as ideas, a fad, etc.5. to run or extend beyond (certain limits) [to overrun second base]6. Archaic to outrun7. Printinga) to rearrange (type matter) by shifting from one line to anotherb) to print more copies of (a given work) than orderedvi.1. to overflow2. to run over or beyond certain limitsn.1. the act or an instance of overrunning2. the amount of money by which a product or project exceeds its estimated cost3. an excess amount produced, as of manufactured goods or copies of printed matter
English World dictionary. V. Neufeldt. 2014.