Definition from Wiktionary, the free dictionary
From Latin deprecatus, past participle of deprecari (“to pray against (a present or impending evil), pray for, intercede for (that which is in danger), rarely imprecate”), from de (“off”) + precari (“to pray”).
- To belittle or express disapproval of.
- (computing) To declare something obsolescent; to recommend against a function, technique, command, etc. that still works but has been replaced.
- (archaic) To pray against.
Derived terms 
Related terms 
express disapproval of
Usage notes 
- Do not confuse with depreciate.
- deprecate in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- deprecate in The Century Dictionary, The Century Co., New York, 1911
- deprecate at OneLook Dictionary Search
Verb form 
- second-person plural present active imperative of dēprecō