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The river is pretty deep here.
an area of high hills and deep valleys
How deep is the snow?
The pond needs to be at least ten feet deep.
He had a deep cut on his forehead.
By this time we were deep inside enemy territory.
a small cabin deep in the woods
Take a few deep breaths to calm yourself down.
He looked at Rosie and gave a deep sigh.
Her husband seemed deep in conversation with Mrs. Beeley.
He was deep in thought, oblivious to all the noise around him.
I was beginning to feel that I was getting into deep water.
He believes in throwing new recruits in at the deep end.
This is the American English definition of deep. View British English definition of deep.
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