adjective . 1. extending far down from the top or surface: a deep well; a deep valley. 2. extending far in or back from the front or from an edge, surface, opening, etc ...
http://dictionary.reference.com/search?q=deep

Deep LA is the hottest night at the Vanguard in Hollywood, California. Showcasing the talents of Los Angeles-based resident DJ Marques Wyatt, Deep is hosted by many of Marques ...
http://www.deep-la.com/

Nontraditional curriculum with a core structure of composition, public speaking, labor, and self-governance.
http://www.deepsprings.edu/

Deep throat is a sexual act in fellatio, in which the whole erect penis, down to the testicles or further, is taken into the mouth and throat, of another person.
http://en.wikipedia.org/wiki/Deep_throat_%28sexual_act%29

Web site of DEEP - a research consortium aimed at reducing exposure to diesel exhaust in underground mining.
http://www.deep.org/