en ‧ gross /ɪnˈɡrəʊs $ -ˈɡroʊs/ BrE AmE verb [transitive]
[ Date: 1300-1400 ; Language: Anglo-French ; Origin: engrosser , from French en gros 'in a mass, by wholesale' ]
if something engrosses you, it interests you so much that you do not notice anything else:
The scene was stunning, and for a time engrossed all our attention.
engross yourself in something
Take your mind off it by engrossing yourself in a good book.
—engrossed adjective :
Dad was engrossed in the paper.
Who’s that guy Ally’s been engrossed in conversation with all night?
—engrossing adjective