What is the meaning of Sacrum?

A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood.

A holy or sacred object, e.g. statue, image, emblem, vessel, utensil.

A holy or sacred place, e.g. sanctuary, shrine, temple.

A religious act or observance, e.g. a sacrifice, festival, rite.

Divine worship or religion.

The private religious rites of a family.

Poems .

Secrets, mysteries.

inflection of sacer:

  1. nominative/accusative/vocative neuter singular
  2. accusative masculine singular

nominative/accusative/vocative neuter singular

accusative masculine singular

sacrum (the sacred world)

sacrum

Source: wiktionary.org