Perverse/pərˈvɜːrs/ Definition 1 of 3Pro Tip 1/3Intentionally Unusual Used when someone knowingly behaves in an odd way. She took perverse delight in wearing her costume out of season. Pro Tip 2/3Provocative Actions Describes actions aimed to upset or shock others. His comments were not just wrong but deliberately perverse. Pro Tip 3/3Contradictory Choices Highlights a choice that goes against logical expectations. Despite the cold, he made the perverse decision to swim.