to occupy completely, as the mind or attention; absorb: Their discussion engrossed his attention. She is engrossed in her work.
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.
to acquire the whole of (a commodity), in order to control the market; monopolize.
Origin of engross
1275–1325;Middle Englishengros(s)en to gather in large quantities, draft (a will, etc.) in final form < Anglo-Frenchengrosser, partly < Medieval Latiningrossāre to thicken, write large and thick (Latinin-in-2 + gross(us) thick + -āre infinitive suffix); partly < Anglo-French,Middle Frenchen gros in quantity, wholesale < Latinin + grossus; see gross
Related formsen·gross·ed·ly[en-groh-sid-lee, -grohst-]/ɛnˈgroʊ sɪd li, -ˈgroʊst-/, adverben·gross·er, nounre·en·gross, verb (used with object)self-en·grossed, adjectiveun·en·grossed, adjective
C14 (in the sense: to buy up wholesale): from Old French en gros in quantity; C15 (in the sense: to write in large letters): probably from Medieval Latin ingrossāre; both from Latin grossus thick, gross
c.1400, "to buy up the whole stock of" (in Anglo-French from c.1300), from Old French en gros "in bulk, in a large quantity, at wholesale," as opposed to en detail. See gross.
Figurative sense of "absorb the whole attention" is first attested 1709. A parallel engross, meaning "to write (something) in large letters," is from Anglo-French engrosser, from Old French en gros "in large (letters)." Related: Engrossed; engrossing.