1. [n]  a purposeful surveillance to guard or observe
2. [n]  a devotional watch (especially on the eve of a religious festival)
3. [n]  a small portable timepiece
4. [n]  a person employed to watch for something to happen
5. [n]  a period of time (4 or 2 hours) during which some of a ship's crew are on duty
6. [n]  the period during which someone (especially a guard) is on duty
7. [v]  find out, learn, or determine with certainty, usually by making an inquiry or other effort; "I want to see whether she speaks French"; "See whether it works"; "find out if he speaks Russian"; "Check whether the train leaves on time"
8. [v]  observe with attention; "They watched as the murderer was executed"
9. [v]  observe or determine by looking; "Watch how the dog chases the cats away"
10. [v]  look attentively; "watch a basketball game"
11. [v]  see or watch; "view a show on television"; "This program will be seen all over the world"; "view an exhibition"; "Catch a show on Broadway"; "see a movie"
12. [v]  be vigilant, be on the lookout, be on one's guard, be careful; "Watch out for pickpockets!"
13. [v]  follow with the eyes or the mind; "Keep an eye on the baby, please!"; "The world is watching Sarajevo"; "She followed the men with the binoculars"

Watch
Peter Kropotkin, a Russian anarchist from the early 1920s, finds himself transplanted to Virginia in the late 1990s after he meets a time-travelling man from the far future. A New York Times Notable Book for 2002.

more details ...

1. \Watch\ (w[o^]ch), n. [OE. wacche, AS. w[ae]cce, fr.
   wacian to wake; akin to D. wacht, waak, G. wacht, wache.
   [root]134. See {Wake}, v. i. ]
   1. The act of watching; forbearance of sleep; vigil; wakeful,
      vigilant, or constantly observant attention; close
      observation; guard; preservative or preventive vigilance;
      formerly, a watching or guarding by night.
            Shepherds keeping watch by night.     --Milton.
            All the long night their mournful watch they keep.
                                                  --Addison.
   Note: Watch was formerly distinguished from ward, the former
         signifying a watching or guarding by night, and the
         latter a watching, guarding, or protecting by day
         Hence, they were not unfrequently used together,
         especially in the phrase to keep watch and ward, to
         denote continuous and uninterrupted vigilance or
         protection, or both watching and guarding. This
         distinction is now rarely recognized, watch being used
         to signify a watching or guarding both by night and by
         day, and ward, which is now rarely used, having simply
         the meaning of guard, or protection, without reference
         to time.
               Still, when she slept, he kept both watch and
               ward.                              --Spenser.
               Ward, guard, or custodia, is chiefly applied to
               the daytime, in order to apprehend rioters, and
               robbers on the highway . . . Watch, is properly
               applicable to the night only, . . . and it begins
               when ward ends, and ends when that begins.
                                                  --Blackstone.
   2. One who watches, or those who watch; a watchman, or a body
      of watchmen; a sentry; a guard.
            Pilate said unto them, Ye have a watch; go your way,
            make it as sure as ye can.            --Matt. xxvii.
                                                  65.
   3. The post or office of a watchman; also, the place where a
      watchman is posted, or where a guard is kept.
            He upbraids Iago, that he made him Brave me upon the
            watch.                                --Shak.
   4. The period of the night during which a person does duty as
      a sentinel, or guard; the time from the placing of a
      sentinel till his relief; hence, a division of the night.
            I did stand my watch upon the hill.   --Shak.
            Might we but hear . . . Or whistle from the lodge,
            or village cock Count the night watches to his
            feathery dames.                       --Milton.
   5. A small timepiece, or chronometer, to be carried about the
      person, the machinery of which is moved by a spring.
   Note: Watches are often distinguished by the kind of
         escapement used, as an {anchor watch}, a {lever watch},
         a {chronometer watch}, etc. (see the Note under
         {Escapement}, n., 3); also, by the kind of case, as a
         {gold} or {silver watch}, an {open-faced watch}, a
         {hunting watch}, or {hunter}, etc.
   6. (Naut.)
      (a) An allotted portion of time, usually four hour for
          standing watch, or being on deck ready for duty. Cf.
          {Dogwatch}.
      (b) That part, usually one half, of the officers and crew,
          who together attend to the working of a vessel for an
          allotted time, usually four hours. The watches are
          designated as the {port watch}, and the {starboard
          watch}.
   {Anchor watch} (Naut.), a detail of one or more men who keep
      watch on deck when a vessel is at anchor.
   {To be on the watch}, to be looking steadily for some event.
   {Watch and ward} (Law), the charge or care of certain
      officers to keep a watch by night and a guard by day in
      towns, cities, and other districts, for the preservation
      of the public peace. --Wharton. --Burrill.
   {Watch and watch} (Naut.), the regular alternation in being
      on watch and off watch of the two watches into which a
      ship's crew is commonly divided.
   {Watch barrel}, the brass box in a watch, containing the
      mainspring.
   {Watch bell} (Naut.), a bell struck when the half-hour glass
      is run out, or at the end of each half hour. --Craig.
   {Watch bill} (Naut.), a list of the officers and crew of a
      ship as divided into watches, with their stations.
      --Totten.
   {Watch case}, the case, or outside covering, of a watch;
      also, a case for holding a watch, or in which it is kept.
   {Watch chain}. Same as {watch guard}, below.
   {Watch clock}, a watchman's clock; see under {Watchman}.
   {Watch fire}, a fire lighted at night, as a signal, or for
      the use of a watch or guard.
   {Watch glass}.
      (a) A concavo-convex glass for covering the face, or dial,
          of a watch; -- also called {watch crystal}.
      (b) (Naut.) A half-hour glass used to measure the time of
          a watch on deck.
   {Watch guard}, a chain or cord by which a watch is attached
      to the person.
   {Watch gun} (Naut.), a gun sometimes fired on shipboard at 8
      p. m., when the night watch begins.
   {Watch light}, a low-burning lamp used by watchers at night;
      formerly, a candle having a rush wick.
   {Watch night}, The last night of the year; -- so called by
      the Methodists, Moravians, and others, who observe it by
      holding religious meetings lasting until after midnight.
   {Watch paper}, an old-fashioned ornament for the inside of a
      watch case, made of paper cut in some fanciful design, as
      a vase with flowers, etc.
   {Watch tackle} (Naut.), a small, handy purchase, consisting
      of a tailed double block, and a single block with a hook.
   

2. \Watch\, v. i. [Cf. AS. w[oe]ccan, wacian. [root]134. See
   {Watch}, n., {Wake}, v. i. ]
   1. To be awake; to be or continue without sleep; to wake; to
      keep vigil.
            I have two nights watched with you.   --Shak.
            Couldest thou not watch one hour ?    --Mark xiv.
                                                  37.
   2. To be attentive or vigilant; to give heed; to be on the
      lookout; to keep guard; to act as sentinel.
            Take ye heed, watch and pray.         --Mark xiii.
                                                  33.
            The Son gave signal high To the bright minister that
            watched.                              --Milton.
   3. To be expectant; to look with expectation; to wait; to
      seek opportunity.
            My soul waiteth for the Lord more than they that
            watch for the morning.                --Ps. cxxx. 6.
   4. To remain awake with any one as nurse or attendant; to
      attend on the sick during the night; as, to watch with a
      man in a fever.
   5. (Naut.) To serve the purpose of a watchman by floating
      properly in its place; -- said of a buoy.
   {To watch over}, to be cautiously observant of; to inspect,
      superintend, and guard.
   

3. \Watch\, v. t. [imp. & p. p. {Watched}; p. pr. & vb. n.
   {Watching}.]
   1. To give heed to; to observe the actions or motions of, for
      any purpose; to keep in view; not to lose from sight and
      observation; as, to watch the progress of a bill in the
      legislature.
            Saul also sent messengers unto David's house to
            watch him, and to slay him.           --1 Sam. xix.
                                                  11
            I must cool a little, and watch my opportunity.
                                                  --Landor.
            In lazy mood I watched the little circles die.
                                                  --Longfellow.
   2. To tend; to guard; to have in keeping.
            And flaming ministers, to watch and tend Their
            earthy charge.                        --Milton.
            Paris watched the flocks in the groves of Ida.
                                                  --Broome.