Deprecate means to criticize, protest against, or belittle something or someone. It can also mean to ward off by prayer or to indicate that a software feature is outdated. See usage, synonyms, and examples of deprecate. I think the Wikipedia-article on Deprecation answers this one pretty well: In the process of authoring computer software, its standards or documentation, deprecation is a status applied to software features to indicate that they should be avoided, typically because they have been superseded. Although deprecated features remain in the software, their use may raise warning messages recommending alternative practices, and deprecation may indicate that the feature will be removed in the future ... Understanding the term "deprecated" is crucial, especially for those involved in technology and software development, as it helps in maintaining current standards and practices. DEPRECATED definition: 1. past simple and past participle of deprecate 2. to not approve of something or say that you do…. Learn more.