/ liˈeɪzn; NAmE liˈeɪzɑːn; ˈliəzɑːn/ noun
1.
[ U , sing. ] liaison (between A and B) a relationship between two organizations or different departments in an organization, involving the exchange of information or ideas :
Our role is to ensure liaison between schools and parents.
We work in close liaison with the police.
2.
[ C ] liaison (to / with sb/sth) a person whose job is to make sure there is a good relationship between two groups or organizations :
the White House liaison to organized labor
3.
[ C ] liaison (with sb) a secret sexual relationship, especially if one or both partners are married
SYN affair
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WORD ORIGIN
mid 17th cent. (as a cookery term): from French , from lier to bind.