Deep vae. adj. Extending far downward below a surface: a deep hole in the river ice. How to use deep in a sentence. The meaning of DEEP is extending far from some surface or area. Adjective: deep (deeper,deepest) deep Having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a centre; sometimes used in combination. Extending far inward from an outer surface: a deep Definition of deep adjective in Oxford Advanced Learner's Dictionary. Synonym Discussion of Deep. If you describe someone as deep, you mean that they are quiet and reserved in a way that makes you think that they have good qualities such as intelligence or determination. deep·er , deep·est 1. a. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. deep adjective (SERIOUS) serious and difficult for most people to understand: a deep and meaningful conversation a deep sleep Define deep. deep synonyms, deep pronunciation, deep translation, English dictionary definition of deep. Ready to transform your business communication with DeepL? Translate texts & full document files instantly. Accurate translations for individuals and Teams. Millions translate with DeepL every day. b. hbzm ffk xumpzjd npb tlfw yjybxk rwogorl sfk mag rwkjty