demnition adjective 1adverb 1exclamation 1 adjective1 •(euphemistic, no longer used) Damned.Luckily for you, my farming is a good deal hindered by these demnition snows and frosts […] — 1841 adverb1 •(euphemistic, no longer used) Damned, very.‘The wine is demnition good!’ replied Selden; ‘but our friend Charley seems to be in the dumps—it don’t wake him up.’ — 1849 exclamation1 •(euphemistic, no longer used) Damn (used to express anger, irritation, disappointment, annoyance, contempt, etc.).“[…] It is enough to make one swear. Demnition! if my mother heard of it, what would she say!” — 1852