I. “+ adjective
Etymology: Middle English, from Old English unhālig, from un- (I) + hālig holy — more at holy
1. : irreligious or showing disregard for what is holy : profane , wicked
souls unholy and unclean — John Wesley
may excommunicate the heretical as well as the unholy — A.C.McGiffert
2.
a. : violating accepted civil or social standards : corrupt , immoral
an unholy reputation for branding everything they could, regardless of ownership — American Guide Series: Arizona
b. : deserving of censure : damning , reprehensible
add condescension to bad manners in a singularly unholy combination — Geographical Journal
an unholy alliance between public utility companies
3.
a. : of a sinister character : fiendish , malicious
delirium of grandeur is more dangerous still if the man is ready to live and to die … for his unholy dream — A.L.Guérard
takes unholy joy … in telling off brutally his family of three — Parker Tyler
b. : shockingly big or barbarous : god-awful , raucous
rarely … has society been in such an unholy mess — Nation
an unholy clatter as of ash and refuse cans being dragged across sidewalks — Charles Breasted
next morning, at an unholy hour, I heard … an air-raid siren — Sydney (Australia) Bulletin
II. noun
: an impious or disreputable person