In a manner relating to or characteristic of the stars, the spiritual realm, or an astral body.
From 'astral' (relating to stars, from Latin 'astralis') plus the adverbial suffix '-ly'. The concept developed from ancient astronomy and later spiritual/occult traditions.
Medieval scholars used 'astral' to describe things related to the stars, but by the 1800s, spiritualists claimed humans had 'astral bodies' that could travel beyond the physical body—the same word shifted from astronomy to the supernatural!
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