Definition of lyonnaise in English:

lyonnaise

adjective

  • (of food, especially sliced potatoes) cooked with onions or with a white wine and onion sauce.

    • ‘Al dente asparagus with expertly made hollandaise sauce, flavorful onion-laced lyonnaise and mashed potatoes made winning side dishes.’
    • ‘I made the salad lyonnaise and the English muffins for brunch for friends today.’
    • ‘Both "Tripe Lyonnaise" and "Tripe Poulette" (also included in this database) are delicious family dishes.’

Origin

French, characteristic of the city of Lyons.

Pronunciation:

lyonnaise

/ˌliːəˈneɪz/