/ Dictionary / Index O overspill: Meaning and Definition of Find definitions for: o•ver•spill Pronunciation: (v.ō"vur-spil'n.ō'vur-spil"), [key] — v., n. -spilled -spilt, -spill•ing, —v.i. to spill over. —n. the act of spilling over. something that spills over. overflow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: overspill (Thesaurus) overspend overspin Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language