'Eerily' definitions:

Definition of 'eerily'

From: WordNet
adverb
In an unnatural eery manner; "it was eerily quiet in the chapel" [syn: eerily, spookily]

Definition of 'Eerily'

From: GCIDE
  • Eerily \Ee"ri*ly\, adv. In a strange, unearthly way. [1913 Webster]