RER.
A commuter rail or overground system, especially one with relatively high speeds and widely-spaced stations in urban areas.
Meaning & usage
A commuter rail or overground system, especially one with relatively high speeds and widely-spaced stations in urban areas.
Conventional translation of German S-Bahn in German-speaking regions of Switzerland, regardless of whether a system would otherwise be classed as an RER.
Where this word comes from
Réseau Express Régional (Regional Express Network)
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.