sacred

Definitions:

Consecrated to a religious purpose; connected with religion or a religious service; consecrated; venerable; inviolable.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Pert. to God, or to His worship; pert. to religion or religious uses; not profane; inviolable.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Pertaining to God; holy; inviolable.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Sacredness.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
Set apart or dedicated, esp. to God: made holy: proceeding from God: religious: entitled to respect or veneration: inviolable.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
Set apart for religious uses; as, a sacred edifice; pertaining to religion; as, sacred literature; consecrated; holy; not to be treated irreverently; as, he held his mother's memory sacred.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Sacredly.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adverb) (adv.) (adverb)

Usage examples:

Place is to me sacred almost as body.
- What's Mine's Mine by George MacDonald
Nothing is sacred from one's maid.
- Red Hair by Elinor Glyn
I feel quite happy in knowing that you, as the son of a gentleman, Antony, will hold all that you have heard quite sacred
- The Story of Antony Grace by George Manville Fenn