1. undergang - Noun
2. undergang - Verb
undergang (third-person singular simple present undergangs, present participle underganging, simple past and past participle underganged)
(rare or dialectal, Northern England, Scotland) To undergo; pass through; endure.
undergang (plural undergangs)
(rare or dialectal, Northern England, Scotland) A passage beneath any obstruction, e.g. a roadway tunnel beneath a railway, etc.