"Intermediate state" or "in-between state", According to Tibetan tradition, the state of existence intermediate between two lives. The Tibetan word bardo means literally "intermediate state"—also translated as "transitional state" or "in-between state" or "liminal state". In Sanskrit the concept has the name antarabhāva. It is a concept which arose soon after the Buddha's passing, with a number of earlier Buddhist groups accepting the existence of such an intermediate state, while other schools rejected it.
Used loosely, the term "bardo" refers to the state of existence intermediate between two lives on earth. According to Tibetan tradition, after death and before one's next birth, when one's consciousness is not connected with a physical body, one experiences a variety of phenomena.
Example via www.ramdass.org: Featured Teacher: Kalu Rinpoche
Example via www.mindpodnetwork.com: Tulku Urgyen Rinpoche’s “As It Is”