Collins COBUILD Advanced Learner's English Dictionary - unearthly

1. You use unearthly to describe something that seems very strange and unnatural. For a few seconds we watched the unearthly lights on the water... The sound was so serene that it seemed unearthly. ADJ: usu ADJ n 2. If you refer to a time as an unearthly hour, you are emphasizing that it is very early in the morning. They arranged to meet in Riverside Park at the unearthly hour of seven in the morning. = ungodly ADJ: ADJ n c darkgreen]emphasis 3. An unearthly noise is unpleasant because it sounds frightening and unnatural. She heard the sirens scream their unearthly wail. ADJ: usu ADJ n