LIAISON

[noun]There is an unfortunate lack of liaison between the various government departments. [U]The police have appointed a liaison officer to encourage liaison with the local community. [U](esp. US) He's a liaison (= a person who acts as a connection) between the two groups. [C]A liaison is also a sexual relationship, esp. between two people not married to each other.He's had many notorious liaisons, even with people in the same office.