Erratic \Er*rat"ic\, a. [L. erraticus, fr. errare to wander: cf.
   F. erratique. See {Err}.]
   1. Having no certain course; roving about without a fixed
      destination; wandering; moving; -- hence, applied to the
      planets as distinguished from the fixed stars.
      
[1913 Webster]


            The earth and each erratic world.     --Blackmore.
      
[1913 Webster]


   2. Deviating from a wise of the common course in opinion or
      conduct; eccentric; strange; queer; as, erratic conduct.
      
[1913 Webster]


   3. Irregular; changeable. "Erratic fever." --Harvey.
      
[1913 Webster]


   {Erratic blocks}, {gravel, etc.} (Geol.), masses of stone
      which have been transported from their original resting
      places by the agency of water, ice, or other causes.

   {Erratic phenomena}, the phenomena which relate to
      transported materials on the earth's surface.
      
[1913 Webster]

Erratic \Er*rat"ic\, n.
   1. One who deviates from common and accepted opinions; one
      who is eccentric or preserve in his intellectual
      character.
      
[1913 Webster]


   2. A rogue. [Obs.] --Cockeram.
      
[1913 Webster]


   3. (Geol.) Any stone or material that has been borne away
      from its original site by natural agencies; esp., a large
      block or fragment of rock; a bowlder.
      
[1913 Webster]


   Note: In the plural the term is applied especially to the
         loose gravel and stones on the earth's surface,
         including what is called drift.
         
[1913 Webster]