A place belonging to a *manor but situated elsewhere, growing crops for the home place; also *grange and outlier; remembered in the placename 'Berwick'. In *DB, it is clear that berewick land belonged to the lord of the home estate, the *caputhonoris. Such places were in the charge of a *berebretus. [< OldEngl. bere = barley + wick = village, i.e. a place where barley was stored.]
Dictionary of Medieval Terms and Phrases. Christopher Coredon with Ann Williams.