1. In a relatively unproductive state or position; on an exceptionally slow path toward development or success. Despite a series of robust investments and initiatives, the company has remained in the slow lane compared to its competitors. The World Health Organization reported that the country is currently in the slow lane in its efforts to combat the outbreak.

2. Not engaging in energetic, pleasure-driven, or risky behavior; only doing mundane, uninteresting things. I've been firmly in the slow lane after having kids. I just don't have the time or energy to do the wild things I used to when I was younger.