Sacred

adjective

1. Characterized by solemn religious ceremony or religious use, especially, in a positive sense; consecrated, made holy.

   "a sacred day"

2. Religious; relating to religion, or to the services of religion; not secular
3. Spiritual; concerned with metaphysics.
4. Designated or exalted by a divine sanction; possessing the highest title to obedience, honor, reverence, or veneration; entitled to extreme reverence; venerable.
5. Not to be profaned or violated; inviolable.