Lapse into Definition 1 of 4Pro Tip 1/3Negative Context Often used when someone begins an unwanted behavior or emotional state. Following the news, the entire team lapsed into silence. Pro Tip 2/3Subtle Change Implies a gradual transition rather than a sudden one. He didn't notice when he lapsed into negativity. Pro Tip 3/3Unintended Highlights that the change was not planned or intentional. I lapsed into old routines as the semester dragged on.