eat-in adjective 3eat in verb 3forms 4 adjective3 •Designed for dining in as well as food preparation.Add an appealing small house — but bigger than it looks — with its bookshelved study, sunny panelled living room, chair-railed dining room, and large eat-in country kitchen. — 1967 •Featuring seating to allow patrons to stay and eat their food on site. •Eaten on the premises at which it is bought.Would you prefer an eat-in meal or just a takeaway? eat in verb3 •To eat a meal at home. •(UK) To eat a purchased meal on the premises where one bought it, rather than taking it away. •To etch or erode a substance. (of acid) formsate in · eaten in · eating in · eats in