Pronunciation: (grēn'māl"), [key]
—n. Stock Exchange.
the practice of buying a large block of a company's stock in order to force a rise in stock prices or an offer by the company to repurchase that block of stock at an inflated price to thwart a possible takeover bid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.