A2 having a long distance from the top to the bottom or from the front to the back: The water is a lot deeper than it seems.
B1 A deep colour is strong and dark: deep brown eyes
one metre, six feet, etc. deep › one metre, six feet, etc. from the top to the bottom, or from the front to the back: This end of the pool is two metres deep. one inch, six feet, etc. deep › one inch, six feet, etc. from the top to the bottom, or from the front the back: This end of the pool is eight feet deep.
› A deep feeling is very strong: deep affection
a deep sleep › the action of someone sleeping in a way that makes it difficult to wake them up
› A deep sound is low: a deep voice