an organization (or person) making an unwanted, aggressive bid for the next organization.
raider that produces a bid unwanted by administration. A white knight might be known as to save the organization.
business raider which makes an acquisition bid deemed unwelcome by the target firm's administration. The threatened administration will then seek a white knight to rescue it.
That he was capable of better work than is suggested by his average accomplishment is shown by two allegorical poems - the Complaint of the Black Knight and the Temple of Glass (once attributed to Hawes).