Watch 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.