Re or RE may refer to:

Geography

* Re, Norway, a former municipality in Vestfold county, Norway *

Re, Vestland Re or Reed is a village in Gloppen Municipality in Vestland county, Norway. The village is located on the eastern shore of the lake Breimsvatnet, along the European route E39 highway, about west of the village of Byrkjelo and about southeast of ...

, a village in Gloppen municipality, Vestland county, Norway * Re, Piedmont, an Italian municipality * Île de Ré, an island off the west coast of France **

Le Bois-Plage-en-Ré Le Bois-Plage-en-Ré () is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France. It is situated on the Île de Ré. Population See also *Communes of the Charente-Maritime department The follow ...

, a commune on that island *

Re di Anfo The Re di Anfo is a stream (or '' torrente'') in the Province of Brescia, Lombardy. Its source is on Cima Meghè and it flows into Lago d'Idro at Anfo on the western side of the lake. Its entire course is contained within the territory of the Com ...

, a torrent (seasonal stream) in Italy * Re di Gianico, Re di Niardo, Re di Sellero, and Re di Tredenus, torrents in the Val Camonica *

Réunion Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island ...

(ISO 3166-1 code), a French overseas department and island in the Indian Ocean

Music

* Re, the second syllable of the scale in solfège ** Re, or D (musical note), the second note of the musical scale in ''fixed do'' solfège * Re: (band), a musical duo based in Canada and the United States

Albums

* ''Re'' (Café Tacuba album) * ''Re'' (Les Rita Mitsouko album) * ''Re.'' (Aya Ueto album) * ''Re:'' (Kard EP)

Other media

* Resident Evil, popular video game franchise of survival horror * ''...Re'' (film), a 2016 Indian Kannada-language film

Language

re (interjection) ''More'', ''re'', ''bre'' (with many variants) are interjections and/or vocative particles common to Albanian, Greek, Romanian, South Slavic (Bulgarian, Serbian ), Turkish, Venetian and Ukrainian. According to Eric Hamp with its "locus... more ...

, in Greek * Re (kana), the Japanese syllables written れ and レ * ''

In re ''In re'', Latin for "in the matter f, is a term with several different, but related meanings. Legal use In the legal system in the United States, ''In re'' is used to indicate that a judicial proceeding may not have formally designated advers ...

'', Latin for 'in the matter of...' ** RE: and Re:, used in email subject lines

People

Giovanni Battista Re Giovanni Battista Re (born 30 January 1934) is an Italian cardinal of the Roman Catholic Church whose service has been primarily in the Roman Curia. He was elevated to the rank of cardinal in 2001. He was prefect of the Congregation for Bishop ...

, Italian cardinal * Cayetano Ré, former Paraguayan footballer

Political parties

Renew Europe Renew Europe (Renew) is a liberal, pro-European political group of the European Parliament founded for the ninth European Parliament term. The group is the successor to the Alliance of Liberals and Democrats for Europe (ALDE) group which exist ...

, a political group in the European Parliament * Renovación Española, a former Spanish monarchist political party

Science, technology and mathematics

Computer science and mathematics

RE (complexity) In computability theory and computational complexity theory, RE (recursively enumerable) is the class of decision problems for which a 'yes' answer can be verified by a Turing machine in a finite amount of time. Informally, it means that if the answ ...

(recursively enumerable), a complexity class of decision problems ** r.e., a common abbreviation for the older term Recursively enumerable * Regular expression, a sequence of characters to match text against a specified pattern * Re function in mathematics, where Re(''z'') denotes the real part of a

complex number In mathematics, a complex number is an element of a number system that extends the real numbers with a specific element denoted , called the imaginary unit and satisfying the equation i^= -1; every complex number can be expressed in the form ...

''z''

Other uses in science and technology

* Effective reproduction number, in epidemiology * Relative effectiveness, or RE factor, an expression of an explosive's demolition power *

Renewable energy Renewable energy is energy that is collected from renewable resources that are naturally replenished on a human timescale. It includes sources such as sunlight, wind, the movement of water, and geothermal heat. Although most renewable energy ...

Reverse engineering Reverse engineering (also known as backwards engineering or back engineering) is a process or method through which one attempts to understand through deductive reasoning how a previously made device, process, system, or piece of software accompli ...

Reynolds number In fluid mechanics, the Reynolds number () is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the ratio between inertial and viscous forces. At low Reynolds numbers, flows tend to be domi ...

, a dimensionless quantity in fluid mechanics used to help predict flow patterns * Rhenium, symbol Re, a chemical element * Re, an abbreviation for "reference pressure" as

Sound pressure level Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average or equilibrium) atmospheric pressure, caused by a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone ...

* Re, an abbreviation for "reference pressure" in

Underwater acoustics Underwater acoustics is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries. The water may be in the ocean, a lake, a river or a tank. Typ ...

Other uses

Religious education In secular usage, religious education is the teaching of a particular religion (although in the United Kingdom the term ''religious instruction'' would refer to the teaching of a particular religion, with ''religious education'' referring to te ...

(RE), the study of religion * Re (Egyptian religion), an ancient Egyptian god also known as Ra * Regional-Express, a type of regional train in Germany, Luxembourg and Austria *

Royal Engineers The Corps of Royal Engineers, usually called the Royal Engineers (RE), and commonly known as the ''Sappers'', is a corps of the British Army. It provides military engineering and other technical support to the British Armed Forces and is heade ...

, a part of the British Army *

Royal Society of Painter-Printmakers The Royal Society of Painter-Printmakers (RE), known until 1991 as the Royal Society of Painter-Etchers and Engravers, is a leading art institution based in London, England. The Royal Society of Painter-Etchers, as it was originally styled, was ...

, whose fellows may use the Post-nominal letters RE