What does "blessedness" mean?

The condition or state of being blessed; holy.

Blessedness

Common synonyms include: beatitude, beatification, beatifications, beatitudes, blessed, blessing.

/ˈblɛsɪdnɪs/ noun

noun ·Uncommon ·Advanced level

Noun

1
The condition or state of being blessed; holy. countable, uncountable
"But earthlyer happy is the roſe diſtild, / Then that, vvhich, vvithering on the virgin thorne, / Grovves, liues, and dies, in ſingle bleſſedneſſe."
2
a state of supreme happiness wordnet

"But earthlyer happy is the roſe diſtild, / Then that, vvhich, vvithering on the virgin thorne, / Grovves, liues, and dies, in ſingle bleſſedneſſe."

Inherited from Middle English blessednesse, equivalent to blessed + -ness.