Webster's Revised Unabridged Dictionary · 1913

Deprecation

Deprecation (dep`re*kā"shun) , noun

[Latin deprecatio; compare French déprécation.]

1.
The act of deprecating; a praying against evil; prayer that an evil may be removed or prevented. [archaic]
Humble deprecation. — Milton
2.
Entreaty for pardon; petitioning.
3.
An imprecation or curse. [Obsolete] — Gilpin
4.
A strong expression of disapprobation; an expression of a low opinion.