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vb. Act of abetting; to aid. In criminal law, to encourage another to commit a crime. To assist in the commission of a crime. To instigate or encourage by aid or countenance; - used in a bad sense of persons and acts; as, to abet an ill-doer; to abet one in his wicked courses; to abet vice; to abet an insurrection. To support, uphold, or aid; to maintain; - in a good sense. 

 - (Law) To contribute, as an assistant or instigator, to the commission of an offense. 

Syn. - To incite; instigate; set on; egg on; ...