do battle with

an ironclad vessel built by Federal forces to do battle with the Merrimac n

n someone who supervises (an examination) n someone who gives a warning so that a mistake can be avoided n an ironclad vessel built by Federal forces to do battle with the Merrimac n display produced by a device that takes signals and displays them on a television screen or a computer monitor n electronic equipment that is used to check the quality or content of electronic transmissions n a piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble n any of various large tropical carnivorous lizards of Africa and Asia and Australia