1 N-COUNT (高速公路上的)快车道 On a motorway, the fast lane is the part of the road where the vehicles that are travelling fastest go. (高速公路上的)快车道 [mainly British]

2 N-SING 快节奏生活;忙碌刺激的生活 If someone is living in the fast lane, they have a very busy, exciting life, although they sometimes seem to take a lot of risks. 快节奏生活;忙碌刺激的生活