Definify.com

Definition 2024

altbier ‎(plural altbiers)

A form of German top-fermenting beer that originated in Westphalia and later spread to parts of the Rhineland.
- 2007 January 24, Eric Asimov, “Quiet Cover for a Vital Brew”, in New York Times:
  Their own version of brown ale, long the signature beer of the Düsseldorf region in northwestern Germany, is called altbier, literally old beer.