 The Tibetan word "Lama" means "highest principle", and less literally "highest mother" or "highest parent" to show close relationship between teacher and student.Historically, the term was used for venerated spiritual masters or heads of monasteries.Today the title can be used as an honorific title conferred on a monk, nun or (in the Nyingma, Kagyu and Sakya schools) advanced tantric practitioner to designate a level of spiritual attainment and authority to teach, or may be part of a title such as Dalai Lama or Panchen Lama applied to a lineage of reincarnate lamas (Tulkus).