multidecade

alternative multi-decade

1. not comparableExtending over multiple decades.

   With the pound at a multidecade low and British banks requiring ever-larger injections of taxpayer cash, it is no wonder that observers have started to refer to London as “Reykjavik-on-Thames.”

   2009 January 22, Julia Werdigier, Nelson D. Schwartz, “The Falling Pound Raises Fears of Nationalization”, in The New York Times, archived from the original on 06 Feb 2012

   Synonyms: decadeslong