WordNet (r) 3.0 (2006):

Zen
    n 1: school of Mahayana Buddhism asserting that enlightenment
         can come through meditation and intuition rather than
         faith; China and Japan [syn: Zen, Zen Buddhism]
    2: a Buddhist doctrine that enlightenment can be attained
       through direct intuitive insight [syn: Zen, Zen Buddhism]
    3: street name for lysergic acid diethylamide [syn: acid,
       back breaker, battery-acid, dose, dot, Elvis,
       loony toons, Lucy in the sky with diamonds, pane,
       superman, window pane, Zen]

The Jargon File (version 4.4.7, 29 Dec 2003):

zen
 vt.

    To figure out something by meditation or by a sudden flash of
    enlightenment. Originally applied to bugs, but occasionally applied to
    problems of life in general. ?How'd you figure out the buffer allocation
    problem?? ?Oh, I zenned it.? Contrast grok, which connotes a
    time-extended version of zenning a system. Compare hack mode. See also 
    guru.


The Free On-line Dictionary of Computing (30 December 2018):

Zen

   [Kehoe, B., "Zen and the Art of the Internet", February 1992.]

   [Jargon File]


The Free On-line Dictionary of Computing (30 December 2018):

zen

    To figure out something by meditation or by a sudden
   flash of enlightenment.  Originally applied to bugs, but
   occasionally applied to problems of life in general.  "How'd
   you figure out the buffer allocation problem?"  "Oh, I zenned
   it."

   Contrast grok, which connotes a time-extended version of
   zenning a system.  Compare hack mode.  See also guru.

   (1996-09-17)