To be totally absorbed means to be completely engrossed in something. Some synonyms of the phrase are deeply engaged, wholly focused, fully immersed, and intensely involved. Being fully absorbed in a task or activity can lead to a state of flow, where time seems to pass quickly and the individual is fully present in the moment. Other synonyms include engrossed, lost in, captivated, fascinated, and fixated. It is a wonderful feeling to be totally absorbed in something as it allows us to be wholly present, living in the moment and fully concentrating on the activity at hand.