Communication between two parties or groups.
Co-operation, working together.
A relayer of information between two forces in an army or during war.
A tryst, romantic meeting.
An illicit sexual relationship or affair.
The phonological fusion of two consecutive words and the manner in which this occurs, for example intrusion, consonant-vowel linking, etc. In the context of some languages, such as French, liaison can refer specifically to a normally silent final consonant, being pronounced when the next word begins with a vowel, and can often also include the intrusion of a "t" in certain fixed chunks of language such as the question form "pense-t-il".
To liaise.