Meaning of VAJRAYANA in English
Since a "vajra" is a diamond, this term means "The Diamond Way." It refers to the third form of Buddhism (after Theravada and Mahayana ), which is practiced largely in Tibet. It is also known as Tantric Buddhism. The main claim of Vajrayana is that it enables a person to reach nirvana in a single lifetime. It is able to do this by using all of a person's powers (including those of the body) to achieve that goal.
Buddhism English glossary. Английский глоссарий буддизма. 2012