Able to be superposed on each other in such a way as to coincide exactly(adjective)
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Use "superposable" in a sentence
"After all, the flags and the chief of the government are basically superposable."
"But that, throughout their walk, they should describe two identical curves exactly superposable on each other, is altogether unlikely."
"He holds the paper at the distance at which it was at the moment of suggestion, and folds it in the form of a rectangle exactly superposable on the card."