Before "restaurant" was a place, it was a thing — and the thing was a kind of soup. In 18th-century French, restaurant meant a "restorative": a strong, concentrated meat broth sold to people who needed building up. The word is the present participle of the French verb restaurer, "to restore," from Latin restaurare.
A Soup-Shop Sign
The story is well documented. In 1765, a Parisian named Boulanger — or, in other versions, an entrepreneur named Mathurin Roze de Chantoiseau — opened an establishment selling these restaurants (the broths) to paying customers. Above the door, he reportedly hung a sign in mock-Latin: "Venite ad me, omnes qui stomacho laboratis, et ego restaurabo vos" — "Come to me, all who labour with weary stomachs, and I will restore you." The sign was a play on the Latin Vulgate of Matthew 11:28.
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From Broth to Building
By the 1770s and 1780s, the term restaurant was being used in Paris not just for the broth but for the place that sold it — a small-scale eating house where each customer sat at their own small table and ordered from a menu. This was a striking innovation. Before the restaurant, dining out usually meant taking what was on offer at an inn or eating with strangers at a long communal table. The new format — individual tables, individual bills, a written menu — spread quickly during and after the French Revolution, when chefs displaced from aristocratic households needed new work.
Into English
"Restaurant" entered English in the early 19th century as a self-consciously French word for an upmarket eating establishment. For decades it kept an Italic spelling and a French pronunciation. By the late Victorian era, it had been thoroughly naturalised — though the soup it was named after had long since vanished from menus.