[n] similarity by virtue of correspondence
[n] compatibility of observations; "there was no agreement between theory and measurement"; "the results of two tests were in correspondence"
[n] (mathematics) an attribute of a shape; exact correspondence of form on opposite sides of a dividing line or plane
[n] communication by exchange of letters
[n] communication by the exchange of letters
[n] a function such that for every element of one set there is a unique element of another set
[n] the relation of correspondence in degree or size or amount