The definition of sandwich from Oxford is: “an item of food consisting of two pieces of bread with meat, cheese, or other filling between them, eaten as a light meal.”
Or, Merriam-Webster:
“two or more slices of bread or a split roll having a filling in between”
“Filling” is the word you’re looking for, not “meat”.
Can they be considered fillings if the sides are open? I’d lean more to spread.
Yes they’re called sandwich fillings.
The definition of sandwich from Oxford is: “an item of food consisting of two pieces of bread with meat, cheese, or other filling between them, eaten as a light meal.” Or, Merriam-Webster: “two or more slices of bread or a split roll having a filling in between”
So a hotdog is a filling? That’s fucked and I don’t accept that definition.