to occupy completely, as the mind or attention; absorb: Their discussion engrossed his attention. She is engrossed in her work.
2.
to write or copy in a clear, attractive, large script or in a formal manner, as a public document or record: to engross a deed.
3.
to acquire the whole of (a commodity), in order to control the market; monopolize.
Origin: 1275–1325; Middle English engros(s)en to gather in large quantities, draft (a will, etc.) in final form < Anglo-French engrosser, partly < Medieval Latin ingrossāre to thicken, write large and thick (Latin in-in-2 + gross(us) thick + -āre infinitive suffix); partly < Anglo-French, Middle French en gros in quantity, wholesale < Latin in + grossus;see gross