The Collaborative International Dictionary of English v.0.48:
Overrun \O`ver*run"\, v. t. [imp. Overran; p. p. Overrun; p.
pr. & vb. n. Overrunning. ]
1. To run over; to grow or spread over in excess; to invade
and occupy; to take possession of; as, the vine overran
its trellis; the farm is overrun with witch grass.
Those barbarous nations that overran the world.
2. To exceed in distance or speed of running; to go beyond or
pass in running.
Ahimaaz ran by the way of the plain, and overran
Cushi. --2 Sam.
3. To go beyond; to extend in part beyond; as, one line
overruns another in length.
Note: In machinery, a sliding piece is said to overrun its
bearing when its forward end goes beyond it.
4. To abuse or oppress, as if by treading upon.
None of them the feeble overran. --Spenser.
(a) To carry over, or back, as type, from one line or page
into the next after, or next before.
(b) To extend the contents of (a line, column, or page)
into the next line, column, or page.
Moby Thesaurus II by Grady Ward, 1.0:
33 Moby Thesaurus words for "overrunning":
alluvion, alluvium, cataclysm, deluge, diffusion, engulfment,
flood, imbuement, infestation, inundation, invasion, lousiness,
overflow, overflowing, overspreading, overswarming, penetration,
permeation, pervasion, plague, ravage, spill, spillage, submersion,
suffusion, swarm, swarming, teeming, the Deluge, the Flood,
transfusion, washout, whelming