Re

RE may be an abbreviation, word, or name. It may refer to:

Arts and entertainment

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

Re, Norway, a municipality in Vestfold county, Norway
Re, Sogn og Fjordane, a village in Gloppen municipality, Sogn og Fjordane 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

Rhenium, a chemical element with the symbol Re
Re (exclamation), in Greek
Re (kana), the Japanese syllables written れ and レ
Re (Egyptian religion), an ancient Egyptian god also known as Ra
In re, Latin for 'in the matter of...'; see list of Latin phrases
RE: and Re: used in email subject lines is a shortened form of in re (above).
RE (complexity) (recursively enumerable) - complexity class of decision problems for which a 'yes' answer can be verified by a Turing machine in a finite amount of time
Regional-Express, a type of regional train in Germany, Luxembourg and Austria
Reynolds number, a dimensionless quantity in fluid mechanics used to help predict flow patterns