Liaison
Liaison means communication between two or more groups, or co-operation or working together.
Liaison or liaisons may refer to:

General usage
Affair, an unfaithful sexual relationship
Collaboration
Co-operation

Arts and entertainment
Liaisons (Desperate Housewives), a 2007 episode of the American drama series
Liaisons (Star Trek: The Next Generation), a 1993 American sci-fi episode
"Liaisons", a song from Stephen Sondheim's 1973 musical A Little Night Music
Les Liaisons dangereuses,  a 1782 French novel by Pierre Choderlos de Laclos
Liaisons: Re-Imagining Sondheim from the Piano, a 2015 album by Anthony de Mare
Liaison (TV series), a British–French series on Apple TV+

Businesses and organisations
Air Alliance, a defunct Canadian airline (call sign: Liaison)
Liaison Agency Flanders-Europe, a Flemish government body
Liaison Committee (House of Commons of the United Kingdom), of the UK Parliament's lower house
Liaison Committee (House of Lords), of the UK Parliament's upper house
Liaison Committee on Medical Education, an accreditation body for Northern American schools of medicine

Military
Liaison aircraft, a small aircraft used by military forces
Liaison pilot, a World War II pilot who flew liaison aircraft
Liaison Pilot Badge, a qualification badge issued by the United States Army Air Forces during World War II
Liaison officer, a military officer who coordinates different forces or national units usually at Staff level
Military Liaison Element, US special forces personnel attached to embassies
Military liaison missions, Cold War military intelligence missions in Germany

Science and linguistics
Liaison (French), a phonological phenomenon in the French language
Liaison psychiatry, a medical field treating mental conditions comorbid with physiological ones

Waterways
Liaison Dunkerque-Escaut, series of canals in France

See also
Pearl (drag queen), sometimes known as Pearl Liaison
Liaisons dangereuses (disambiguation)