Source : Webster's Revised Unabridged Dictionary (1913)

Deraignment \De*raign"ment\, Derainment \De*rain"ment\, n. [See
   {Darraign}.]
   1. The act of deraigning. [Obs.]

   2. The renunciation of religious or monastic vows. [Obs.]
      --Blount.