. Short stories or sayings unique to Zen Buddhism; the most distinctive characteristic distinguishing Zen from other schools of Mahayana Buddhism; expressions which contain, transmit, and evoke enlightened wisdom; direct expressions of specific wisdom; most koans come from the recorded sayings and doings of the classic Zen masters.
. The assimilation of enlightened wisdom (bodhi prajna) through the illumination of koans within observation meditation; evoking the specific wisdom within particular koans; a method (unique to Zen) for the transmission of enlightened wisdom. See also koan; transmission; prajna.
From the glossary of