Dictionary Definition :
Definition[1]
:
tongyō (Jap, sudden enlightenment). In zen Buddhism, the attainment of enlightenment (satori) as a sudden event, as taught by the Southern School of Ch'an Buddhism (Chinese, Nan-tsung-ch'an). This is in contrast to the slower path of gradual training (zengyō) taught by the Northern School (Chinese, Pei-tsung).
Source
:
A Dictionary of Buddhism, Oxford University Press, 2003, 2004 (which is available in electronic version from answer.com)
Related
:
tonic , tonicity , tonsil , tonsilitic , tonsillitis , tongueless , tongue-tied , tongue-faculty , tongue , tongs