deep

adjective, adverb

/diːp/

Definition

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 5 cm deep. The water's only ankle/knee/waist-deep, so we'll be able to get across the river easily. He thrust his hands deep in(to) his pockets. The submarine sailed deep under the ice cap. Take a few deep breaths (= breaths that fill the lungs with air) and calm down.High, tall and deep

(Definition of deep adjectiveadverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)