greenmail noun 1verb 1forms 3 noun1 •The profiting from an attempted hostile takeover by forcing the target company to buy back the hostile bidder's shares at an inflated price.Greenmails typically result in reduced shareholder value. — 2007 verb1 •To profit from an attempted hostile takeover by forcing the target company to buy back the hostile bidder's shares at an inflated price. formsgreenmailed · greenmailing · greenmails