Pronunciation: (ō"vur-bī'), [key]
—v., -bought, -buy•ing.
1. to purchase in excessive quantities.
2. Finance.to buy on margin in excess of one's ability to provide added security in an emergency, as in a falling market.
to buy regardless of one's needs or financial means.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.