1) prone to slander, slanderous, accusing falsely
a) a calumniator, false accuser, slanderer,
2) metaph. applied to a man who, by opposing the cause of God, may be said to act the part of the devil or to side with him
One who accuses or blames; an officer who prefers an accusation against another for some offense, in the name of the government, before a tribunal that has cognizance of the offense.