Definitions by Prof. Henry Armitage

eldritch 

weird, eerie, but with connotations of being unearthly and perhaps evil or mysteriously sinister

"Night would soon fall, and it was then that the mountainous blasphemy lumbered upon its eldritch course."

(from H.P. Lovecraft's "The Dunwich Horror")

eldritch by Prof. Henry Armitage August 27, 2003