The definition of abet means to support or help with an action, usually an illegal one.(verb)
An example of abet is to give a ride to a person who just robbed a store.
See abet in Webster's New World College Dictionary
See abet in American Heritage Dictionary 4
transitive verb a·bet·ted, a·bet·ting, a·bets
Origin: Middle English abetten
Origin: , from Old French abeter, to entice
Origin: : a-, to (from Latin ad-; see ad-)
Origin: + beter, to bait; see bheid- in Indo-European roots.
Learn more about abet