The doctrine of the union of divine and human natures in Jesus Christ, without confusion of their respective substances.

Hypostatic Union (from the Greek: , "hypostasis," meaning essence)"" in Bauer, Danker, Arndt, & Gingrich, A Greek-English Lexicon of the New Testament & other Early Christian Literature. Chicago: University of Chicago Press, 2000. is a technical term in Christian theology, used in reference to Christology; that is, understanding how the human and divine are united in the person of Christ. The hypostatic union became official doctine at the Council of Chalcedon, which stated that the two natures (divine and human) are united in the one person (essence, "hypostasis") of Christ."Hypostatic Union" in The Westminster Dictionary of Christian Theology, ed.