To monopolize; to concentrate (something) in the single possession of someone, especially unfairly
Octavian then engrosses for himself proconsular powers for ten years in all the provinces where more than one legion was stationed, giving him effective control of the army.
{f} absorb one's interest or attention; write in large clear letters, write in a formal style; monopolize, control a majority of a commodity (Business)
To purchase either the whole or large quantities of, for the purpose of enhancing the price and making a profit; hence, to take or assume in undue quantity, proportion, or degree; as, to engross commodities in market; to engross power