Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: French
Origin: lier 'to tie'

liaison

noun
     
li‧ai‧son
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] asecret sexual relationship between a man and a woman, especially a man and a woman who are married but not to each other [↪ affair]

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