(meteorology) An indication that atmospheric conditions observed in and close to the watch area have created a significant risk for the development of severe thunderstorms capable of producing tornadoes.

plural of tornado watch

(chiefly imperative) To look toward the camera while one's photograph is being taken.

(nautical) The practice of having two alternate watches aboard a ship or vessel.

(idiomatic) To guard and protect.

A watch kept on some premises, or on a town, by guards during the night. / One or more of the guards on such a watch.

The act of watching for the occurrence of fires, for example during wartime bombing raids or in forested areas in hot and dry conditions.

A watch that displays time by means of a dial and hands, in contradistinction to a digital watch.

(idiomatic) To be aware or conscious; to look closely or carefully; to use caution. Often used in the imperative.

Used to warn someone of an imminent danger.