Low German

Short definition from Wiktionary

Noun

1. 1
   A West Germanic language spoken in Low (i.e. Northern) Germany and north-eastern parts of the Netherlands, and formerly also in large parts of eastern and north-eastern Europe, which developed out of Middle Low German from Old Saxon; often treated as a dialect group of German (or Dutch) for convenience, but widely recognized as a separate language.

Adjective

1. 1
   in, of or relating to Low German