Wiktionary
n. (context christianity English) The doctrine of the Trinity.
Wikipedia
Perichoresis (from perikhōrēsis, "rotation") is a term referring to the relationship of the three persons of the triune God (Father, Son, and Holy Spirit) to one another. Circumincession (later circuminsession) is a Latin-derived term for the same concept. It was first used as a term in Christian theology, by the Church Fathers. The noun first appears in the writings of Maximus Confessor (d. 662) but the related verb perichoreo is found earlier in Gregory of Nazianzus (d. 389/90). Gregory used it to describe the relationship between the divine and human natures of Christ as did John of Damascus (d. 749), who also extended it to the "interpenetration" of the three persons of the Trinity, and it became a technical term for the latter. It has been given recent currency by such contemporary writers as Jürgen Moltmann, Miroslav Volf, John Zizioulas and C. Baxter Kruger, and others.
Modern authors extend the original usage as an analogy to cover other interpersonal relationships. The term "co(-)inherence" is sometimes used as a synonym.
Since humans are made in the image of God, a Christian understanding of an adequate anthropology of humans' social relations is informed by the divine attributes, what can be known of God's activity and God's presence in human affairs. Theologians of the Communio school such as Hans Urs von Balthasar, Henri de Lubac and Joseph Ratzinger locate the reciprocal dynamism between God and God's creatures in the liturgical action of sacrament, celebrating the sacred mysteries in Eucharistic communion, in a hermeneutic of continuity and apostolic unity.