Source : Webster's Revised Unabridged Dictionary (1913)

Watch \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.