Adjective

1. Dedicated to a religious purpose or a god.
2. Revered in a religion.
3. Perfect or flawless.
4. Separated or set apart from (something unto something or someone else).
5. Set apart or dedicated for a specific purpose, or for use by a single entity or person.
6. Used as an intensifier in various interjections.

   Holy cow, I can’t believe he actually lost the race!

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Antonyms

Noun

1. A thing that is extremely holy; used almost exclusively in .
   • Franz von Reber, Joseph Thacher Clarke, History of Ancient Art (1882) p. 146:

     The holy of holies, a cubical space of ten cubits on the side, was separated from the larger antechamber by four columns, which were also covered with gold and stood upon silver sockets; they bore a second curtain of four colors.