/dev"euhl tree/ , n. , pl. deviltries .
1. reckless or unrestrained mischievous behavior.
2. extreme or utter wickedness.
3. an act or instance of mischievous or wicked behavior.
4. diabolic magic or art.
5. demonology.
Also, devilry .
[ 1780-90; var. of DEVILRY ]