Definition from macmillandictionary.com
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The river is quite deep here.
an area of high hills and deep valleys
How deep is the snow?
The pond needs to be at least a metre 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
The shelves need to be a bit deeper than that.
I do feel a very deep sympathy for them all.
a feeling of deep gratitude
I recognized George’s deep voice on the other end of the phone.
a deep roaring sound
a beautiful deep red
Take a few deep breaths to calm yourself down.
He looked at Rosie and gave a deep sigh.
She fell into a deep sleep.
We had a very deep conversation about love and death.