mind·less / ˈmīn(d)lis/ • adj. (of a person) acting without concern for the consequences: a generation of mindless vandals. ∎ (esp. of harmful or evil behavior) done for no particular reason: mindless violence. ∎ (mindless of) not thinking of or concerned about: mindless of the fact she was in her nightgown, she rushed to the door. ∎ (of an activity) so simple or repetitive as to be performed automatically without thought or skill: the monotony of housework turns it into a mindless task.DERIVATIVES: mind·less·ly adv.mind·less·ness n.