What expression signifies being extremely focused on a task?

Being "wrapped up in" a task conveys a deep level of engagement and concentration. This expression indicates that someone is fully engrossed in what they are doing, often to the exclusion of their surroundings or other thoughts. It implies a strong commitment to the task at hand, suggesting that the person is not just passively involved but is actively invested in completing or understanding the work they are focused on.

Other phrases such as "thinking about" might suggest consideration or contemplation, but they do not capture the same intensity of involvement. "Distracted by" clearly implies a lack of focus, while "ignoring" suggests neglect of the task altogether. Thus, "wrapped up in" is the most accurate way to describe being extremely focused on a task.