to wait upon

from The Collaborative International Dictionary of English v.0.48
Wait \Wait\, v. i. [imp. & p. p. {Waited}; p. pr. & vb. n.
   {Waiting}.] [OE. waiten, OF. waitier, gaitier, to watch,
   attend, F. guetter to watch, to wait for, fr. OHG. wahta a
   guard, watch, G. wacht, from OHG. wahh[=e]n to watch, be
   awake. [root]134. See {Wake}, v. i.]
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   1. To watch; to observe; to take notice. [Obs.]
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            "But [unless] ye wait well and be privy,
            I wot right well, I am but dead," quoth she.
                                                  --Chaucer.
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   2. To stay or rest in expectation; to stop or remain
      stationary till the arrival of some person or event; to
      rest in patience; to stay; not to depart.
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            All the days of my appointed time will I wait, till
            my change come.                       --Job xiv. 14.
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            They also serve who only stand and wait. --Milton.
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            Haste, my dear father; 't is no time to wait.
                                                  --Dryden.
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   {To wait on} or {To wait upon}.
      (a) To attend, as a servant; to perform services for; as,
          to wait on a gentleman; to wait on the table.
          "Authority and reason on her wait." --Milton. "I must
          wait on myself, must I?" --Shak.
      (b) To attend; to go to see; to visit on business or for
          ceremony.
      (c) To follow, as a consequence; to await. "That ruin that
          waits on such a supine temper." --Dr. H. More.
      (d) To look watchfully at; to follow with the eye; to
          watch. [R.] "It is a point of cunning to wait upon him
          with whom you speak with your eye." --Bacon.
      (e) To attend to; to perform. "Aaron and his sons . . .
          shall wait on their priest's office." --Num. iii. 10.
      (f) (Falconry) To fly above its master, waiting till game
          is sprung; -- said of a hawk. --Encyc. Brit.
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