Re

Re or RE may refer to:

Arts, media and entertainment

 * ...Re (film), a 2016 Indian Kannada-language film
 * Realencyclopädie der classischen Altertumswissenschaft, a German encyclopedia of classical scholarship
 * Resident Evil, a horror game franchise

Music

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

Albums

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

Language

 * re (interjection), in Greek
 * Re (kana) (れ and レ), Japanese syllables
 * In re, Latin for 'in the matter of...'
 * RE: and Re:, a standard email subject line prefix

Organisations

 * Renew Europe, a political group in the European Parliament
 * Renovación Española, a former Spanish monarchist political party
 * Royal Engineers, a part of the British Army
 * Royal Society of Painter-Printmakers, whose fellows may use the Post-nominal letters RE
 * Stobart Air (former IATA code: RE), a former Irish regional airline

Places

 * Re, Norway, a former municipality in Vestfold county
 * Re, Vestland, 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, a commune on that island
 * Re di Anfo, a torrent (seasonal stream) in Italy
 * Re di Gianico, Re di Niardo, Re di Sellero, and Re di Tredenus, torrents in the Val Camonica, Lombardy, Italy
 * Réunion (ISO 3166-1 code), a French overseas department and island in the Indian Ocean

Science and technology

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


 * Reynolds number ($Re$), a dimensionless quantity in fluid mechanics used to help predict flow patterns
 * Rhenium (symbol Re), a chemical element
 * Reference pressure (Re), as sound pressure level
 * Reference pressure (Re), in underwater acoustics

Computing and mathematics

 * RE (complexity) (recursively enumerable), a complexity class of decision problems
 * Recursively enumerable (r.e.), in computability theory
 * 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 z

People

 * Giovanni Battista Re (born 1934), Italian cardinal
 * Cayetano Ré (1938–2013), former Paraguayan footballer

Other uses

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