Princeton's WordNet

1. spiritual, unearthly(adj)

   concerned with or affecting the spirit or soul

   "a spiritual approach to life"; "spiritual fulfillment"; "spiritual values"; "unearthly love"

2. eldritch, weird, uncanny, unearthly(adj)

   suggesting the operation of supernatural influences

   "an eldritch screech"; "the three weird sisters"; "stumps...had uncanny shapes as of monstrous creatures"- John Galsworthy; "an unearthly light"; "he could hear the unearthly scream of some curlew piercing the din"- Henry Kingsley

Wiktionary

1. unearthly(Adjective)

   Not of the earth.

2. unearthly(Adjective)

   Non-terrestrial.

3. unearthly(Adjective)

   Preternatural or supernatural.

4. unearthly(Adjective)

   Strange, enigmatic, or mysterious.

5. unearthly(Adjective)

   Ideal beyond the mundane.

6. unearthly(Adjective)

   Ridiculous, ludicrous, or outrageous.

Webster Dictionary

1. Unearthly(adj)

   not terrestrial; supernatural; preternatural; hence, weird; appalling; terrific; as, an unearthly sight or sound

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