Definition of au gratin
: covered with bread crumbs or grated cheese and browned (as under a broiler)
Examples of au gratin in a sentence
They served potatoes au gratin with the fish.
Origin and Etymology of au gratin
French, literally, with the burnt scrapings from the pan
First Known Use: 1806
AU GRATIN Defined for English Language Learners
Definition of au gratin for English Language Learners
: covered with bread crumbs or cheese and then baked until brown
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