Deplore/dɪˈplɔːr/ Definition 1 of 2Pro Tip 1/3Strong Disapproval Use 'deplore' to express strong disapproval or disappointment about actions or decisions. Many people deplore the destruction of natural habitats. Pro Tip 2/3Formal Contexts 'Deplore' is often used in formal announcements or statements when addressing serious issues. The mayor deplored the increase in crime in his city. Pro Tip 3/3Ethical Stance Using 'deplore', you can convey an ethical stance or societal norm against something. The community deplores the use of child labor in manufacturing.