LEF or Lef may refer to:

Arts and entertainment

* ''LEF'' (journal), a 1920s Soviet journal of aesthetics * '' L.E.F.'', a 2006 album by Ferry Corsten *'' Lef'', or ''Guts'', a 1999 Dutch comedy film

Organizations

LEF – For the New Generation LEF – For the New Generation (, ), also known simply as LEF (), is a political party in the Netherlands focused on youth interests. The party participated in the 2023 House of Representatives elections with Daniël van Duijn as lead candidate, ...

, a political party in the Netherlands *

Leading Edge Forum Leading Edge Forum (LEF) is a British company focusing on programme of research, advisory interventions, and events for clients' capabilities. Leading Edge Forum is a business unit of DXC Technology. History In 1988, CSC acquired the consulti ...

, a British consulting company *

Legal Education Foundation The Legal Education Foundation (LEF) is an independent grant-making foundation operating across the UK to build a society that fosters the principles of justice and fairness, where people understand and use law to bring about positive change and to ...

, a British grant-making foundation *

Life Extension Foundation The Biomedical Research & Longevity Society, formerly the Life Extension Foundation (LEF), is a company founded in 1980 to extend the healthy human lifespan by discovering methods to control aging and eradicate disease. Along with the Life Exten ...

, now the Biomedical Research & Longevity Society, an American organization

Science and technology

Library Exchange Format In integrated circuit design, Library Exchange Format (LEF) is a specification for representing the physical layout of an integrated circuit in an ASCII format. It includes design rules and abstract information about the standard cells. LEF on ...

, an integrated circuit design format *

Luquillo Experimental Forest The Luquillo Experimental Forest (LEF) (''Bosque experimental de Luquillo'') is a protected area of tropical rainforest in northeastern Puerto Rico. The experimental forest is located in the Sierra de Luquillo some east of San Juan, the capital ...

, a UNESCO Biosphere Reserve in Puerto Rico *

Lymphoid enhancer-binding factor 1 Lymphoid enhancer-binding factor 1 (LEF1) is a protein that in humans is encoded by the ''LEF1'' gene. It is a member of T cell factor/lymphoid enhancer factor (TCF/LEF family, TCF/LEF) family. Function Lymphoid enhancer-binding factor-1 (LE ...

, a protein in humans

Other

Lef Nosi Lef Nosi (born Elefter Nosi; 9 April 187720 February 1946) was an Albanian publisher, archivist, philologist, folklorist, ethnographer, numismatist, archaeologist and politician. On 28 November 1912, he was as one of the signatories of the Decla ...

(1877–1946), Albanian publisher, archivist, philologist, and ethnographer {{disambiguation