Definition of Reuben sandwich noun from the Oxford Advanced Learner's Dictionary

 

Reuben sandwich

 noun
noun
BrE
 
; NAmE
 
 
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(in the US) a popular sandwich made with corned beef (= cow meat preserved in salt), Swiss cheese and sauerkraut (= a type of cabbage) on rye bread, which is then grilled (= cooked under a strong heat)