adjective
All our supplies were lost in a deep crevasse in the glacier
Religious philosophy is too deep a subject to discuss at breakfast
Margaret is one of the deepest thinkers on the subject
Don't disturb him when he's deep in thought
He thinks there is a deep plot against him
I know of your deep concern for her
The deep sound of thunder rolled across the valley
The sky was a deep blue
noun
It was midnight on the waters and a storm was on the deep
adverb
We drank deep of the cooling liquid
US