Used without qualification, “bardo” is the state of existence intermediate between two lives on earth.- Bardo (Wikipedia)
In some schools of Buddhism, bardo (Classical Tibetan: བར་དོ་ Wylie: bar do) or antarābhava (Sanskrit, Chinese and Japanese: 中有, romanized in Chinese as zhōng yǒu and in Japanese as chū’u) is an intermediate, transitional, or liminal state between death and rebirth. The concept arose soon after Gautama Buddha’s death, with a number of earlier Buddhist schools accepting the existence of such an intermediate state, while other schools rejected it. The concept of antarābhava, an intervening state between death and rebirth, was brought into Buddhism from the Vedic-Upanishadic (later Hindu) philosophical tradition. Later Buddhism expanded the bardo concept to six or more states of consciousness covering every stage of life and death. In Tibetan Buddhism, bardo is the central theme of the Bardo Thodol (literally Liberation Through Hearing During the Intermediate State), the Tibetan Book of the Dead, a text intended to both guide the recently deceased person through the death bardo to gain a better rebirth and also to help their loved ones with the grieving process.