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1. Dedicated to or set apart for the worship of a deity.
2. Worthy of religious veneration: the sacred teachings of the Buddha.
3. Made or declared holy: sacred bread and wine.
4. Dedicated or devoted exclusively to a single use, purpose, or person: sacred to the memory of her sister; a private office sacred to the President.
5. Worthy of respect; venerable.
6. Of or relating to religious objects, rites, or practices.
[Middle English, past participle of sacren, to consecrate, from Old French sacrer, from Latin sacrāre, from sacer, sacr-, sacred; see sak- in Indo-European roots.]