Deep Definition Meaning | Britannica Dictionary If you feel or believe something deep down or deep down inside, you feel or believe it completely even if you do not say it or show it to other people
deep | Dictionaries and vocabulary tools for English language learners . . . extending far into space obscure, hard to understand, or profound His philosophical essays are quite deep I could add very little to their deep, intellectual discussion intensely felt, as emotions She was overcome with deep sorrow when her mother died low in pitch He has a deep voice and sings bass in the choir dark in color