The three marks of existence are the three fundamental characteristics of conditioned existence in Buddhist thought: impermanence, suffering or unsatisfactoriness, and nonself. Enlightenment is often described as the direct realization of these three marks in all phenomena.
three marks of existence
Skt.: trilaksana; Pali: tilakkhana; Ch.: sanxiang; Tb.: mtshan myid gsum/phyag rgya gsum