Source : Webster's Revised Unabridged Dictionary (1913)

Constable \Con"sta*ble\ (k[u^]n"st[.a]*b'l), n. [OE. conestable,
   constable, a constable (in sense 1), OF. conestable, F.
   conn['e]table, LL. conestabulus, constabularius, comes
   stabuli, orig., count of the stable, master of the horse,
   equerry; comes count (L. companion) + L. stabulum stable. See
   {Count} a nobleman, and {Stable}.]
   1. A high officer in the monarchical establishments of the
      Middle Ages.

Source : WordNet®

constable
     n 1: a lawman with less authority and jurisdiction than a sheriff
     2: English landscape painter (1776-1837) [syn: {John Constable}]
     3: a police officer of the lowest rank [syn: {police constable}]