The Collaborative International Dictionary of English v.0.48:

Espy \Es*py"\, v. t. [imp. & p. p. Espied; p. pr. & vb. n.
   Espying.] [OF. espier, F. ['e]pier, from OHG. speh?n to
   watch, spy, G. sp[aum]hen; akin to L. specere to look,
   species sight, shape, appearance, kind. See Spice, Spy,
   and cf. Espionage.]
   1. To catch sight of; to perceive with the eyes; to discover,
      as a distant object partly concealed, or not obvious to
      notice; to see at a glance; to discern unexpectedly; to
      spy; as, to espy land; to espy a man in a crowd.
      [1913 Webster]

            As one of them opened his sack to give his ass
            provender in the inn, . . . he espied his money.
                                                  --Gen. xlii.
                                                  27.
      [1913 Webster]

            A goodly vessel did I then espy
            Come like a giant from a haven broad. --Wordsworth.
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   2. To inspect narrowly; to examine and keep watch upon; to
      watch; to observe.
      [1913 Webster]

            He sends angels to espy us in all our ways. --Jer.
                                                  Taylor.

   Syn: To discern; discover; detect; descry; spy.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Espy \Es*py"\, v. i.
   To look or search narrowly; to look about; to watch; to take
   notice; to spy.
   [1913 Webster]

         Stand by the way, and espy.              --Jer. xlviii.
                                                  19.
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The Collaborative International Dictionary of English v.0.48:

Espy \Es*py"\, n.; pl. Espies. [OF. espie. See Espy, v.,
   Spy.]
   A spy; a scout. [Obs.] --Huloet.
   [1913 Webster]

U.S. Gazetteer (1990):

Espy, PA (CDP, FIPS 24088)
  Location: 41.00500 N, 76.41769 W
  Population (1990): 1430 (655 housing units)
  Area: 2.4 sq km (land), 0.4 sq km (water)

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "espy":
   behold, catch, catch sight of, clap eyes on, descry, detect,
   discern, discover, distinguish, encounter, glimpse, have in sight,
   hit, identify, ken, lay eyes on, look on, look upon, make out,
   mark, meet with, note, notice, observe, perceive, pick out,
   pick up, recognize, remark, see, sense, sight, spot, spy, take in,
   twig, view, witness