What does "engross" mean?

Additional senses

1. 2.To copy or write in a large hand (en gross, i. e., in large); to write a fair copy of in distinct and legible characters; as, to engross a deed or like instrument on parchment. Some period long past, when clerks engrossed their stiff and formal chirography on more substantial materials. Hawthorne. Laws that may be engrossed on a finger nail. De Quincey.
2. 3.To seize in the gross; to take the whole of; to occupy wholly; to absorb; as, the subject engrossed all his thoughts.
3. 4.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. Engrossed bill (Legislation), one which has been plainly engrossed on parchment, with all its amendments, preparatory to final action on its passage. -- Engrossing hand (Penmanship), a fair, round style of writing suitable for engrossing legal documents, legislative bills, etc. See Absorb.