Definitions from Wiktionary ( )

▸ noun:  A portable or wearable timepiece.
▸ noun:  The act of guarding and observing someone or something.
▸ noun:  A particular time period when guarding is kept.
▸ noun:  A period of wakefulness between the two sleeps of a biphasic sleep pattern (the dead sleep or first sleep and morning sleep or second sleep): the first waking.
▸ noun:  A person or group of people who guard.
▸ noun:  The post or office of a watchman; also, the place where a watchman is posted, or where a guard is kept.
▸ noun:  (nautical) A group of sailors and officers aboard a ship or shore station with a common period of duty: starboard watch, port watch.
▸ noun:  (nautical) A period of time on duty, usually four hours in length; the officers and crew who tend the working of a vessel during the same watch. (FM 55–501).
▸ noun:  The act of seeing, or viewing, for a period of time.
▸ verb:  (transitive, intransitive) To look at, see, or view for a period of time.
▸ verb:  (transitive) To observe over a period of time; to notice or pay attention.
▸ verb:  (transitive) To mind, attend, or guard.
▸ verb:  (transitive) To be wary or cautious of.
▸ verb:  (transitive) To attend to dangers to or regarding.
▸ verb:  (intransitive) To remain awake with a sick or dying person; to maintain a vigil.
▸ verb:  (intransitive) To be vigilant or on one's guard.
▸ verb:  (intransitive) To act as a lookout.
▸ verb:  (nautical, of a buoy) To serve the purpose of a watchman by floating properly in its place.
▸ verb:  (obsolete, intransitive) To be awake.
▸ verb:  (transitive, obsolete) To be on the lookout for; to wait for expectantly.

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