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liaison

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liaison
liaison /liˈeɪzən $ ˈliːəzɑːn, liˈeɪ-/ noun
 Date: 1600-1700
 Language: French
 Origin: lier 'to tie'
1. [singular, uncountable] the regular exchange of information between groups of people, especially at work, so that each group knows what the other is doing
    liaison between
    close liaison between the army and police
    liaison with
    better liaison with other agencies
    in liaison with something
    The project has been set up in liaison with the art department.
2. (also liaison officer) [countable] someone whose job is to talk to different departments or groups and to tell each of them about what the others are doing
    liaison to
    Renee Ball, liaison to the State Parks Authority
3. [countable] a secret sexual relationship between a man and a woman, especially a man and a woman who are married but not to each other ⇨ affair