ଅର୍ଥ : Someone who supervises (an examination).

ଅର୍ଥ : Someone who gives a warning so that a mistake can be avoided.

ଅର୍ଥ : An ironclad vessel built by Federal forces to do battle with the Merrimac.

ଅର୍ଥ : Display produced by a device that takes signals and displays them on a television screen or a computer monitor.

ଅର୍ଥ : Electronic equipment that is used to check the quality or content of electronic transmissions.

ଅର୍ଥ : A piece of electronic equipment that keeps track of the operation of a system continuously and warns of trouble.

ଅର୍ଥ : Any of various large tropical carnivorous lizards of Africa and Asia and Australia. Fabled to warn of crocodiles.

ଅର୍ଥ : Keep tabs on. Keep an eye on. Keep under surveillance.

ଅର୍ଥ : Check, track, or observe by means of a receiver.