Pronunciation: (ō"vur-hwelm', -welm'), [key]
1. to overcome completely in mind or feeling: overwhelmed by remorse.
2. to overpower or overcome, esp. with superior forces; destroy; crush: Roman troops were overwhelmed by barbarians.
3. to cover or bury beneath a mass of something, as floodwaters, debris, or an avalanche; submerge: Lava from erupting Vesuvius overwhelmed the city of Pompeii.
4. to load, heap, treat, or address with an overpowering or excessive amount of anything: a child overwhelmed with presents; to overwhelm someone with questions.
5. to overthrow.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.