In the Zone

Urban Dictionary

1. Being Completely Unaware of what's going on around you as you are So Extremely into what's going on right in front of your face; like anything more than 3 feet away just doesn't register in the brain. 
2. Expression used to describe a state of consciousness where actual skills match the perceived performance requirements perfectly. Being in the zone implies increased focus and attention which allow for higher levels of performance. Athletes, musicians, and anybody that totally owns a challenge of physical and mental performance can be in the zone.
3. Term used to describe a state of mind whereby a person/machine is working/performing at peak or optimal performance. Usually applied to athletes, sportsmen/women. Not to be confused with the term high on drugs.
4. A place where your beyond "on a roll" and your performance is at max skill and your potential becomes more than what it is and anything around you becomes phased out seemingly a place where you cant be stopped or touched. Mostly gained by anyone who plays sports, fighters, adrenaline junkies, people who play video games, musicians, ministers, teachers ect. The Zone is reached little effort or after one has been "on a roll" for a bit or quickly reached when your skill reaches the next level.

Traditional Dictionary 

noun

any continuous area that differs in some respect, or is distinguished for some purpose, from adjoining areas, or within which certain distinctive circumstances exist or are established

the zone, Informal. a state of intense concentration and focus that greatly improves a person's performance in a physical or mental activity, especially in sports