Definitions

1. adjective

causing or feeling a feeling of fear or unease

“The creepy atmosphere of the old mansion made it seem creepier at night.”

2. comparative

more frightening or disturbing than another

“This movie is creepier than the first one, but still enjoyable.”

3. adverb

in a way that causes or feels fear or unease

“She walked creepier through the abandoned house, feeling uneasy.”