GNU Collaborative International Dictionary of English

Found one definition

1.       
   Deprecation (dĕpˌrḗ‑kāˈshŭn), n. [L. deprecatio; cf. F. déprécation.]
   1. The act of deprecating; a praying against evil; prayer that an evil may be removed or prevented. [archaic]
   
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   Humble deprecation. Milton.
   
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   2. Entreaty for pardon; petitioning.
   
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   3. An imprecation or curse. [Obs.]  Gilpin.
   
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   4. A strong expression of disapprobation; an expression of a low opinion.
   
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