engrossed
UK: ɪnˈɡrəʊst | US: ɪnˈɡroʊst
adj. completely absorbed or occupied in something
vt. (archaic) to produce a final, formal copy of a legal document
The word "engrossed" originates from the Old French "en gros" (literally "in large"), referring to writing in a formal, large script for legal documents. Over time, "engross" evolved to mean "absorb fully" (as if monopolizing attention like a monopolist buying up goods "in bulk"). The past participle "engrossed" now primarily describes deep mental absorption, while the verb's archaic sense survives in legal contexts.
She was so engrossed in her book that she missed her train stop.
The lawyer engrossed the contract in flawless calligraphy.
He sat engrossed in thought, unaware of the noise around him.
The audience was utterly engrossed by the pianist’s performance.
Medieval scribes engrossed royal decrees on parchment.