Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “deep”

See all translations

deep

adjective uk   /diːp/ us  

deep adjective (LONG WAY DOWN)

A2 going or being a long way down from the top or surface, or being of a particular distance from the top to the bottom: a deep well/mine a deep river/sea a deep cut The hole is so deep you can't see the bottom. The water's not deep here - look, I can touch the bottom. Drill 20 holes, each 2 inches deep. The water's only ankle/knee/waist-deep, so we'll be able to get across the river easily. Take a few deep breaths (= breaths that fill the lungs with air) and calm down.
More examples

deep adjective (STRONGLY FELT)

B2 very strongly felt or experienced and usually lasting a long time: Their son has been a deep disappointment to them. We're in deep trouble. She fell into a deep sleep.
More examples

deep adjective (LOW)

B2 (of a sound) low: a wonderfully deep voice
More examples

deep adjective (COMPLICATED)

C2 showing or needing serious thought, or not easy to understand: His films are generally too deep for me.
More examples

deep adjective (FRONT TO BACK)

B2 If something is deep, it has a large distance between its edges, especially between its front and back edges: Is the alcove deep enough for bookshelves? The wardrobe is 2 m high, 1 m wide and 60 cm deep. By midnight, there were customers standing six deep (= in six rows) at the bar.deep in/inside/within sth B1 near the middle of something, and a long distance from its edges: Little Red Riding Hood's grandmother lived in a house deep in the forest.

deep adjective (DARK)

B1 (of a colour) strong and dark: The sky was deep blue.

deep

deep

(Definition of deep from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of deep?
Add Cambridge dictionaries to your browser to your website

Definitions of “deep” in other dictionaries

Word of the Day

christmassy

typical of Christmas, or happy because it is Christmas

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

cinderella surgery noun

December 15, 2014
cosmetic surgery to the feet We have all heard of people having nose jobs, boob jobs and liposuction – but now a new trend growing in popularity in America: Cinderella surgery.

Read More