Definition - What does Amitabha mean?
In Mahayana Buddhism, Amitabha is known as the great savior buddha. His name means “infinite light” or “infinite radiance” in Sanskrit, and he is associated with love and compassion.
In some traditions, Amitabha is known as one of the dhyani-buddhas, five celestial and eternal figures who are symbolically depicted in a mandala. Amitabha reigns in the west, while the other buddhas include Akshobhya in the east, Vairocana in the center, Amoghasiddhi in the north and Ratnasambhava in the south.
Yogapedia explains Amitabha
According to Buddhist sutras, Amitabha was a king who renounced his title and became a monk named Dharmakara. After completing his vows and attaining buddhahood, he reigned as Amitabha in Sukhavati, or the western paradise. One of his vows was that the faithful who recite his name would be reborn into his land and live in bliss until achieving enlightenment.
One mantra that Buddhists recite to invoke the blessings of Amitabha is Om Amideva Hrih. Om is the cosmic vibration of the universe. Ami represents Amitabha, while deva means “divine.” Hrih is the seed mantra of Amitabha and represents compassion.