"Sandwich" is not a well-defined word. Is a hot dog a sandwich? Yes, according to some. No, according to others. For example, New York's definition includes a

"Sandwich" is not a well-defined word. Is a hot dog a sandwich? Yes, according to some. No, according to others. For example, New York's definition includes a buttered bagel, hot dogs, gyros, and wraps. https://www.tax.ny.gov/pubs_and_bulls/tg_bulletins/st/sandwiches.htm https://www.tax.ny.gov/pubs_and_bulls/tg_bulletins/st/sandwi... By that definition, this medieval recipe, which uses thin flatbread, is a sandwich. The Earl-of-Sandwich style sandwich requires sliced bread. The quote from the 1773 English cookbook even says "thin slices of bread."