Pratyekayana is one of the three yanas known to Mahayana Buddhism. It translates literally as the solitary vehicle.
A Solitary Buddha (Pratyeka-Buddha) is an indidividual who achieves liberation, but does not teach other beings. Pratyeka-Buddhas do not depend upon the teachings of others, but achieve Nirvana through personal self-discovery alone. Pratyekabuddhas are not interested in turning the wheel of Dharma for the first time.