1. (

• Zen ,
• Zen_Buddhism

) school of Mahayana Buddhism asserting that enlightenment can come through meditation and intuition rather than faith; China and Japan ;

2. (

• Zen ,
• Zen_Buddhism

) a Buddhist doctrine that enlightenment can be attained through direct intuitive insight ;

3. (

• acid ,
• back_breaker ,
• battery-acid ,
• dose ,
• dot ,
• Elvis ,
• loony_toons ,
• Lucy_in_the_sky_with_diamonds ,
• pane ,
• superman ,
• window_pane ,
• Zen

) street name for lysergic acid diethylamide ;