Devilment/ˈdevlmənt/ Definition 1 of 2Pro Tip 1/3Informal Use Used in casual conversation rather than formal writing or speech. Her devilment was just harmless fun during the party. Pro Tip 2/3Often Playful Implies playfulness; not usually serious harm or malice. The twinkling eyes of the old man promised some kind of devilment. Pro Tip 3/3Usually For Kids Commonly refers to children's behavior rather than adults'. The children's devilment was evident by the painted dog.