Definition of "liaison"

liaison

/li.ˈeɪ.ˌzɒ̃/

noun
countable and uncountable, plural liaisons
1. Communication between two parties or groups.
2. Cooperation, working together.
3. A relayer of information between two forces in an army or during war.
4. Any person who relays information between two groups or organizations.
5. A tryst; a romantic meeting.
6. (figuratively) An illicit sexual relationship or affair.
  Quotations
  ostriches in breeding season are relentlessly promiscuous, with both males and females seeking liaisons with multiple partners.
  2020 August 4, Richard Conniff, “They may look goofy, but ostriches are nobody’s fool”, in National Geographic Magazine‎
7. (phonology) Fusion of two consecutive words and the manner in which this occurs.
  1. (phonology) The pronunciation of a normally silent final consonant when the next word begins with a vowel.
verb
third-person singular simple present liaisons, present participle liaisoning, simple past and past participle liaisoned
1. (proscribed) To liaise.