Senseless/ˈsensləs/ Definition 1 of 3Pro Tip 1/3Lack of Rationality Use 'senseless' to describe actions that are hard to justify logically. The senseless decision left everyone baffled. Pro Tip 2/3Absurdity Highlighted 'Senseless' emphasizes the irrational aspect of situations or behaviors. The movie plot was senseless and confusing. Pro Tip 3/3Negative Connotation Using 'senseless' often implies disapproval of the action or idea. They argued for hours in a senseless debate.