approver

from WordNet (r) 3.0 (2006)
approver
    n 1: an authority with power to approve
    
from The Collaborative International Dictionary of English v.0.48
Approver \Ap*prov"er\, n.
   1. One who approves. Formerly, one who made proof or trial.
      [1913 Webster]

   2. An informer; an accuser. [Obs.] --Chaucer.
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   3. (Eng. Law) One who confesses a crime and accuses another.
      See 1st {Approvement}, 2.
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from The Collaborative International Dictionary of English v.0.48
Approver \Ap*prov"er\, n. [See 2d {Approve}, v. t.] (Eng. Law)
   A bailiff or steward; an agent. [Obs.] --Jacobs.
   [1913 Webster]
    
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
APPROVER, Engl. crim. law. One confessing himself guilty of felony, and
approving others of the same crime to save himself. Crompt. Inst. 250 3
Inst. 129.
    

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