What does correspondency mean?
"Correspondency" is a rare English noun denoting agreement, conformity, or a mutual relation between two or more things — the sense in which one might speak of a correspondency between a theory and the observed facts. In earlier centuries it was also used for the exchange of letters, a role now filled almost entirely by its sibling word "correspondence." Derived from the same roots, the two terms overlap so closely that "correspondency" has largely dropped out of ordinary use, surviving mainly in older literature and in formal or philosophical writing where the abstract idea of matching or answering to something is emphasized. Because it is unfamiliar to most readers, encountering it often prompts a double-take; yet its meaning can be reliably inferred from its more common relative. For anyone interested in the history of English vocabulary, it offers a neat example of how one of two near-identical words can flourish while the other quietly recedes into the background of the language.
nounA now uncommon term for agreement, conformity, or mutual relation between things; also, communication by exchanged letters. It functions as a variant of the far more common word "correspondence."
- Agreement, conformity, or mutual relation between things.
- (Now chiefly historical) Communication by means of exchanged letters.
"The architect noted a pleasing correspondency between the building's proportions and the natural landscape around it."
"There was a close correspondency between the two accounts of the event."
"Their regular correspondency continued for decades after they left university."
The plural is rare, appearing mainly in older or scholarly texts discussing multiple points of agreement.
"The treatise catalogued several correspondencies between alchemical symbols and planetary bodies."
Before "correspondence" won the job, English speakers used the clunkier-but-charming "correspondency" to describe two things agreeing — a word that has all but vanished from everyday use.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of correspondency
"Correspondency" derives from the verb "correspond," which entered English in the late Middle Ages from Medieval Latin "correspondere" — a compound of "cor-" (together) and "respondere" (to answer). The noun form arose in English by the sixteenth or seventeenth century alongside "correspondence," both built on the same base with different Latinate suffix patterns. Its closest relatives are "correspondence," "correspondent," and ultimately "respond" and "response."
How correspondency is actually used
"Correspondency" is rare and has an archaic or formal flavor today; writers almost always choose "correspondence" instead. It survives mainly in older texts and specialized discussions of harmony or analogy between things.
Easily confused with correspondency
"Correspondency" is a rarer, largely historical synonym for the state of agreeing or matching, while "correspondence" is the standard modern word both for that state and for letter-writing itself.