correspondence

Correspondence is a body of letters or communications. If you've ever had a pen pal or an email buddy, you’ve written plenty of correspondence.

Besides referring to that stack of love letters you've bound up with ribbon, correspondence has a couple of other meanings, too. When you and your friend hold similar opinions about a particular subject, your thoughts are in correspondence, or "agreement." In mathematics, symmetrical objects are in correspondence — that is, they mirror each other exactly.

Primary Meanings of correspondence

1.
n
(mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane
2.
n
compatibility of observations
3.
n
communication by the exchange of letters
Full Definitions of correspondence
1

n (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane

Synonyms:
balance, symmetricalness, symmetry
Antonyms:
asymmetry, dissymmetry, imbalance
(mathematics) a lack of symmetry
Types:
geometrical regularity, regularity
a property of polygons: the property of having equal sides and equal angles
bilateral symmetry, bilateralism, bilaterality
the property of being symmetrical about a vertical plane
radial symmetry
the property of symmetry about an axis
Type of:
spatial property, spatiality
any property relating to or occupying space

n the relation of corresponding in degree or size or amount

Synonyms:
commensurateness, proportionateness
Type of:
proportionality
a ratio of two quantities that is constant

n similarity by virtue of corresponding

Synonyms:
parallelism
Type of:
similarity
the quality of being similar
2

n compatibility of observations

“the results of two tests were in correspondence
Synonyms:
agreement
Types:
conformance, conformity
correspondence in form or appearance
justness, nicety, rightness
conformity with some esthetic standard of correctness or propriety
normality
conformity with the norm
Type of:
compatibility
capability of existing or performing in harmonious or congenial combination
3

n communication by the exchange of letters

Types:
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card
a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures)
get-well card
a card expressing get-well wishes
greeting card
a card sent to express personal greetings
mailing-card, post card, postal card, postcard
a card for sending messages by post without an envelope
sympathy card
a card expressing sympathy
Type of:
1st class, 1st-class mail, first class, first-class mail
mail that includes letters and postcards and packages sealed against inspection
black and white, written communication, written language
communication by means of written symbols (either printed or handwritten)

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