Definition of pommes allumettes in US English:

pommes allumettes

noun

Cookery
  • Thin fried potatoes in the shape of matchsticks.

Origin

1960s; earliest use found in Len Deighton (b. 1929), novelist. From French pommes allumettes (plural) from French pomme potato + allumette (in cookery) dish prepared in the shape of matchsticks.

Pronunciation

pommes allumettes

/ˌpɒm al(j)uːˈmɛt/