From Longman Dictionary of Contemporary Englishconnectioncon‧nec‧tion /kəˈnekʃən/ ●●● S3 W2 noun 1 relationship [countable]CONNECTED WITH the way in which two facts, ideas, events etc are related to each other, and one is affected or caused by the other SYN linkconnection between the causal connection between smoking and cancer There is a connection between pollution and the death of trees.connection with Mr O'Hara had no known connection with terrorist activity.connection to Williams apparently has no connection to the case. Police have so far failed to establish a connection between the two murders. The evidence was there in the file but no one made the connection. Students often see little connection between school and the rest of their lives. He demonstrated the close connection between social conditions and health.2 joining [countable, uncountable]JOIN something TOGETHER when two or more things are joined together or when something is joined to a larger system or network a digital telephone connection via satellite They’re offering free Internet connection.connection to The socket allows connection to a PC. There’s a £25 connection charge (=money you pay to be connected to a service such as telephones, electricity etc).3 → in connection with something4 electrical wire [countable]TEE a wire or piece of metal joining two parts of a machine or electrical system an electrical connection There’s a loose connection (=wires which are not joined correctly).5 train/flight etc [countable]TT a train, bus, or plane which is arranged to leave at a time that allows passengers from an earlier train, bus, or plane to use it to continue their journeyconnection to If this train gets delayed we’ll miss our connection to Paris.6 road/railway etc [countable]TT a road, railway etc that joins two places and allows people to travel between them Cheshunt has good rail connections to London.7 → connectionsCOLLOCATIONSverbshave a connection (with/to something)A lot of social problems have a direct connection to alcohol or drug use.see a connectionIt's easy to see a connection between stress and illness.make a connectionIn learning to read, children make a connection between a written sign and a known sound or word.establish a connection (=show that there is one)Scientists have attempted to establish a connection between these two theories.discover/find a connectionThis is the first official investigation to find a connection.something suggests a connectionThere is nothing to suggest a connection between the hospital food and the illness.break a connection (=stop it existing)We must break the connection between money and politics.sever a connection (=break it)We cannot sever our connection with the past.adjectivesa direct connectionMany people see a direct connection between these events.a close/strong connectionthe close connection between maths and physicsan intimate connection (=a very close connection)There is an intimate connection between political liberty and economic freedom.a causal connection (=that causes or is caused by something else)Psychologists have established a causal connection between behaviour and rewards.a clear/obvious connectionThere is an obvious connection between this painting and his earlier works.a loose connection (also a tenuous connection formal) (=one that is not strong, close, or obvious)There seemed to be only a loose connection between the questions and the answers.
Examples from the Corpusconnection• Students need to realize that there is a connection between education and their future.• Now for them to find out there was a connection between you and Mahoney means they find out what sort of connection.• People like him have severed all connection with the old rules.• Sheldon revealed the close connection between poverty and bad health.• Carefully check all the electrical connections.• Shirley used her connections in the country music industry to get a recording contract.• I felt an immediate connection with Luisa as soon as I met her.• There must be a loose connection somewhere - the phone isn't working.• There must be a loose connection somewhere that's stopping it from working.• When holding their baby, they experienced an overwhelming feeling of loving connection.• Whilst doing this Marvell can live in his own world which has no connection with anything external or real at all.• None the less we are twinned with a small town in Hampshire with which we have no real connection.• By the end of the decade, direct satellite connections for the Internet may be available.• I believe Joe's family has Spanish connections.• Intelligent people tend to have strong connections between the neurons in their brains.• Check the connections to make sure all the wires are in the correct places.• The two incidents might have something to do with each other, but I can't see the connection.• The attorney general's office did not say who they were or what connection they allegedly may have had with the escape.the close connection• This suggests again the close connection between property regulations and marriage patterns.• The returns on research expenditure and the close connection between research and increased yields are irrefutable.loose connection• He claimed it was merely a loose connection.• However, both arguments are spurious, for there is a very loose connection between tense and time.From Longman Business Dictionaryconnectioncon‧nec‧tion /kəˈnekʃən/ (also connexion British English) noun1[countable]TELECOMMUNICATIONS something that joins you to a system, for example the telephone network or the InternetDo you have a broadband connection?I keep getting an error message saying that someone has unplugged the phone connection.2[countable usually plural] someone you know who can help you or be useful to you in business or in your careerShe has a lot of business connections in the advertising industry.3TRAVEL [countable] a train, bus, plane etc that you need to catch after getting off another one, in order to continue your journeyI missed my connection and had to wait three hours for the next plane.4TRANSPORTTRAVEL connections [plural] roads, railways etc that people can use to go from a place to other placesThe city has good road and rail connections with other parts of Europe.5in connection with something/somebody formal concerning something or someoneSeveral people were arrested in connection with the affair.