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 Cooperation (written as co-operation in British English) is the process of groups of organisms working or acting together for common, mutual, or some underlying benefit, as opposed to working in competition for selfish benefit. Many animal a ...

Arts and entertainment

* Liaisons (''Desperate Housewives''), a 2007 episode of the American drama series ''Desperate Housewives'' * Liaisons (''Star Trek: The Next Generation''), a 1993 episode of ''Star Trek: The Next Generation'' * "Liaisons", a song from the 1973 musical ''

A Little Night Music ''A Little Night Music'' is a musical with music and lyrics by Stephen Sondheim and book by Hugh Wheeler. Inspired by the 1955 Ingmar Bergman film ''Smiles of a Summer Night'', it involves the romantic lives of several couples. Its title is a ...

'' by Stephen Sondheim * ''

Les Liaisons dangereuses ''Les Liaisons dangereuses'' (; English: ''Dangerous Liaisons'') is a French epistolary novel by Pierre Choderlos de Laclos, first published in four volumes by Durand Neveu from March 23, 1782. It is the story of the Marquise de Merteuil and ...

'', a 1782 French novel by Pierre Choderlos de Laclos * '' Liaisons: Re-Imagining Sondheim from the Piano'', a 2015 album performed by Anthony de Mare

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) The Liaison Committee is a committee of the British House of Commons, the lower house of the United Kingdom Parliament. The committee consists of the chairs of the 32 Commons select committees and the chair of the Joint Committee on Human Right ...

, of the UK Parliament's lower house *

Liaison Committee (House of Lords) The Liaison Committee is a select committee of the House of Lords. The Committee advises the House on financial and other resources required by the body's select committees and allocates those resources among them. It is also responsible for review ...

, of the UK Parliament's upper house *

Liaison Committee on Medical Education The Liaison Committee on Medical Education (LCME) is an accrediting body for educational programs at schools of medicine in the United States and Canada.''Glossary.'' ACGME website. The LCME is sponsored by the Association of American Medical Co ...

, an accreditation body for Northern American schools of medicine

Military

* Liaison aircraft, a small aircraft used by military forces **

Liaison pilot A liaison pilot was a World War II United States enlisted pilot, whose wings bore an "L" in the center. They flew light single engine liaison aircraft. Included were many enlisted aviation students who washed out of pilot training after having so ...

, a World War II pilot who flew liaison aircraft **

Liaison Pilot Badge The Glider Pilot, Liaison Pilot, and Service Pilot badges were qualification badges of the United States Army Air Forces issued during the years of World War II to identify a rating in one of three specialized, limited-duty pilot categories whose s ...

, a qualification badge issued by the United States Army Air Forces during World War II *

Liaison officer A Liaison officer is a person who liaises between two or more organizations to communicate and coordinate their activities on a matter of mutual concern. Generally, liaison officers are used for achieving the best utilization of resources, or empl ...

, a military officer who coordinates different forces or national units usually at Staff level *

Military Liaison Element A military liaison element (MLE) is small group of special forces personnel, sometimes just one or two at a time, attached to embassies in Africa, Southeast Asia, South America, or elsewhere that terrorists are thought to be operating, planning att ...

, US special forces personnel attached to embassies *

Military liaison missions The military liaison missions arose from reciprocal agreements formed between the Western allied nations (the US, the UK, and France) and the USSR shortly after the end of the Second World War. The missions were active from 1946 until 1990. The ...

, Cold War military intelligence missions in Germany

Science

Liaison (French) In French, liaison () is the pronunciation of a linking consonant between two words in an appropriate phonetic and syntactic context. For example, the word ''les'' ('the') is pronounced , the word ''amis'' ('friends') is pronounced , but the ...

, a phonological phenomenon in the French language *

Liaison psychiatry Liaison psychiatry, also known as consultative psychiatry or consultation-liaison psychiatry is the branch of psychiatry that specialises in the interface between general medicine/pediatrics and psychiatry, usually taking place in a hospital or ...

, a medical field treating mental conditions comorbid with physiological ones

Waterways

Liaison Dunkerque-Escaut The Dunkirk-Scheldt Canal is a 189 km long series of historic canals, and the canalised river Scheldt that were substantially rebuilt from the mid-1950s up to ca. 1980, with some new sections, from Dunkirk to the Belgian border at Mortagne-d ...