The Collaborative International Dictionary of English v.0.48:

Overly \O"ver*ly\, a.
   1. Careless; negligent; inattentive; superfical; not
      thorough. [Archaic] --Bp. Hall.
      [1913 Webster]

   2. Excessive; too much. [R.] --Coleridge.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

overly \o"ver*ly\, adv.
   1. In an overly manner. [Archaic]
      [1913 Webster]

   2. Excessively.
      [PJC]

WordNet (r) 3.0 (2006):

overly
    adv 1: to a degree exceeding normal or proper limits; "too big"
           [syn: excessively, overly, to a fault, too]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "overly":
   damned, disproportionately, exceedingly, excessively, exorbitantly,
   extraordinarily, extremely, immensely, immoderately, inordinately,
   intemperately, outrageously, over, overfull, overmuch,
   overweeningly, too, too much, too-too, unconscionably, unduly,
   unreasonably, very



U.S. Gazetteer Places (2000):

Overly, ND -- U.S. city in North Dakota
   Population (2000):    19
   Housing Units (2000): 10
   Land area (2000):     0.357669 sq. miles (0.926358 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.357669 sq. miles (0.926358 sq. km)
   FIPS code:            60380
   Located within:       North Dakota (ND), FIPS 38
   Location:             48.682460 N, 100.149586 W
   ZIP Codes (1990):     58360
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Overly, ND
    Overly