What is Connection ?
Connection is (noun) 1. a relationship between things There is a definite connection between smoking and lung cancer. He said that there was no connection between how much he had had to drink and his falling over in the street. in connection with your visit referring to your visit 2. something such as a train or plane which you catch after getting off another train or plane My train was late and I missed my connection to Birmingham. 3. a wire which connects pieces of equipment There is a loose connection somewhere.
source: Easier English, Student Dictionary Upper Intermediate Level