name

• (religion) A school of Mahayana Buddhism characterized by sudden enlightenment achieved by indirect means and principally associated with China and Japan.
  "For Orientals these mysterious formulae are clear and familiar truths, but for us they are completely bewildering... Dhyana Buddhism, which is known in Japan as "Zen"... is not speculation at all but immediate experience of what, as the bottomless ground of Being, cannot be apprehended by intellectual means, and cannot be conceived or interpreted even after the most unequivocal and incontestable experiences: one knows it by not knowing it."

adj

• (religion) Of or related to Zen Buddhism.
  "Zen meditation"
• (colloquial) Alternative letter-case form of zen.
  ""It sounds very Zen," I said. "A log cabin with no logs.""

noun

• (religion) Synonym of enlightenment, particularly the kind acquired through Zen meditation.

adj

• (religion) Alternative letter-case form of Zen: of or related to Zen Buddhism, particularly its focus on indirect teaching of wisdom through riddles and stories.
  "Greggs: You hung over? Just sayin', you look like shit. Moreland: You know what you need at a crime scene? Greggs: Rubber glove? Moreland: Soft eyes. Greggs: Like I'm s'posed to cry an' shit? Moreland: You got soft eyes, you can see the whole thing. You got hard eyes? You starin' at the same tree, missin' the forest. Greggs: Ah. Zen shit. Moreland: Soft eyes, grasshopper."
• (colloquial) Wise, displaying enlightenment or similar wisdom, insightful, unburdened and free of worries, extremely relaxed and capable.