intransitive verb. To look or observe attentively or carefully; be closely observant.

intransitive verb. To look and wait expectantly or in anticipation.

intransitive verb. To act as a spectator; look on.

intransitive verb. To stay awake at night while serving as a guard, sentinel, or watcher.

intransitive verb. To stay alert as a devotional or religious exercise; keep vigil.

intransitive verb. To look at steadily; observe carefully or continuously.

intransitive verb. To guard, keep surveillance on, or spy on.

intransitive verb. To observe the course of mentally; keep up on or informed about.

intransitive verb. To pay close attention to or be careful about, especially with regard to propriety.

intransitive verb. To tend or take care of (a flock or children, for example). synonym: tend.

noun. The act or process of keeping awake or mentally alert, especially for the purpose of guarding.

noun. undefined

noun. The act of observing closely or the condition of being closely observed; surveillance.

noun. A period of close observation, often in order to discover something.

noun. A person or group of people serving, especially at night, to guard or protect.

noun. The post or period of duty of a guard, sentinel, or watcher.

noun. Any of the periods into which the night is divided; a part of the night.

noun. undefined

noun. Any of the periods of time, usually four hours, into which the day aboard ship is divided and during which a part of the crew is assigned to duty.

noun. The members of a ship's crew on duty during a specific watch.

noun. A chronometer on a ship.

noun. undefined

noun. A period of wakefulness, especially one observed as a religious vigil.

noun. A funeral wake.

noun. A small portable timepiece, especially one worn on the wrist or carried in the pocket.

noun. A flock of nightingales.

phrasal verb. To be careful or on the alert; take care.

phrasal verb. To be in charge of; superintend.

idiom. (watch it) To be careful.

idiom. (watch (one's) step) To act or proceed with care and caution.

idiom. (watch (one's) step) To behave as is demanded, required, or appropriate.

To assign to a watch.

To be awake; be or continue without sleep; keep vigil.

To be attentive, circumspect, or vigilant; be closely observant; notice carefully; give heed.

To act as a watchman, guard, sentinel, or the like; keep watch.

To look forward with expectation; be expectant; seek opportunity; wait.

To act as attendant or nurse on the sick by night; remain awake to give attendance, assistance, or the like: as, to watch with a patient in a fever.

To float on the surface of the water: said of a buoy.

To look with close attention at or on; keep carefully and constantly in view or supervision; keep a sharp lookout on or for; observe, notice, or regard with vigilance and care; keep an eye upon.

To have in keeping; tend; guard; take care of.

To look for; wait for.

To take or detect by lying in wait; surprise.

In falconry, to keep awake; keep from sleep, as a hawk, for the purpose of exhausting and taming it.

noun. The state of being awake; wake-fulness.

noun. A keeping awake for the purpose of attending, guarding, or preserving; attendance with out sleep; preservative or preventive vigilance; vigil.

noun. A wake. See wake, n., 2.

noun. Close, constant, observation; vigilant attention; careful, continued notice; supervision; vigilance; outlook: as, to be on the watch.

noun. A person, or number of persons, whose duty it is to watch over the persons, property, or interests of others; a watchman, or body of watchmen; a sentinel; a sentry; guard.

noun. The period of time during which one person or body of persons watch or stand sentinel, or the time from one relief of sentinels to another; hence, a division of the night, when the precautionary setting of a watch is most generally necessary; period of time; hour.

noun. Nautical: