Source : Webster's Revised Unabridged Dictionary (1913)

Greencloth \Green"cloth`\ (-kl[o^]th`; 115), n.
   A board or court of justice formerly held in the counting
   house of the British sovereign's household, composed of the
   lord steward and his officers, and having cognizance of
   matters of justice in the household, with power to correct
   offenders and keep the peace within the verge of the palace,
   which extends two hundred yards beyond the gates.