Definition of "diabolism" [di•ab•o•lism]

• Dealings with or worship of the devil or demons; sorcery. (noun)
• Devilish conduct or character. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This exceedingly grave and important accusation, together with its side issues, has perhaps all the more claim on our consideration because, apart from actual diabolism, which is in itself so paralysing as almost to arrest discussion, it conflicts with all that we know or believe concerning the Masonic constitution."
• "He sees Aldous's early "diabolism" as "a very thin and papery mask"; he refers to wishful thinking, to unsureness of judgment, to gullibility, to matters of self-regard."
• "Those who traffic in human flesh lose their respect for pious, consecrated humanity and will resort to any kind of diabolism to cover up their crimes."