engrossed

engrossed [ɪngroʊst]

[ADJ] If you are engrossed in something, it holds your attention completely.

Tony didn't notice because he was too engrossed in his work.

While the world watches revolutions in the Arab world and a nuclear crisis in Japan, the Group of 20 is engrossed in an esoteric debate over something called indicative guidelines. http://finclip.blogspot.com/