One way to think of zen is this: a total state of focus that incorporates a total togetherness of body and mind. Zen is a way of being. It also is a state of mind. Zen involves dropping illusion and seeing things without distortion created by your own thoughts.
n: a state of coolness only attained through a totally laid-back type of attitude.
adj.: used to describe someone/something that has reached an uber state of coolness and inner peace