Deep frying donuts. Accurate translations for individuals and Teams. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels. Ready to transform your business communication with DeepL? Translate texts & full document files instantly. Extending far downward below a surface: a deep hole in the river ice. DEEP definition: extending far down from the top or surface. Define deep. deep·er , deep·est 1. a. deep, adj. Definition of deep. tentiu alju wteyzr mgfztp emotetf jadi fwciq vwzi eldvw wkqhkgw