Open English Wordnet

(a)deephaving great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination“a deep well”, “a deep dive”, “deep water”, “a deep casserole”, “a deep gash”, “deep massage”, “deep pressure receptors in muscles”, “deep shelves”, “a deep closet”, “surrounded by a deep yard”, “hit the ball to deep center field”, “in deep space”, “waist-deep”