the moment at which an aircraft leaves the ground （飞机的）起飞◆The plane is ready for take-off. 飞机即将起飞。OPPlanding
the moment at which sth suddenly becomes very successful 大获成功；起飞◆The local economy is poised for take-off. 当地经济蓄势待发。◆The company are hoping for a quick take-off for their latest phone. 这家公司希望他们的最新款电话一举成功。