Ajahn


Ajahn is a Thai language term which translates as "professor" or "teacher." It is derived from the Pali word ācariya, and is a term of respect, similar in meaning to the Japanese sensei, and is used as a title of address for high-school and university teachers, and for Buddhist monks who have passed ten vassa. The term "ajahn" is customarily used to address forest tradition monks and the term Luang Por, "Venerable father" is customarily used to address city tradition monks in Thai Buddhism.

Buddhism

According to the Vinaya, any properly ordained monk can become an ācariya after ten vassa in the robes, thus a Thai monk becomes ajahn.
A senior monk may bear the honorific title phra ajahn, or in more informal situations, than ajahn.
Some famous ajahns are:
In Thai, such highly esteemed monks would rarely be called simply ajahn chah, ajahn mun, etc., as there are much more respectful ways for addressing or referring to them.
The term "Ajahn" is generally not formal enough to be used without the prefix "Pra" or "Tan" for monks when addressed by the laity, but this formality has been loosened when it comes to Western monks and Theravada monks well known outside Thailand.