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| Date: | 1600-1700 |
| Language: | French |
| Origin: | lier 'to tie' |
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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
close liaison between the army and police2 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
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]
