Definition of "communion"

communion

/kəˈmjuːnjən/

noun
countable and uncountable, plural communions
1. A joining together of minds or spirits; a mental connection.
  Quotations
  It would be uplifting to think that the ziggurat was the first expression of Near Eastern civilization, for then one could speak about humanity's fascination with the heavens, of the human quest for communion with the infinite.
  1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 159
2. (Christianity) Holy Communion.
  Quotations
  It is with the day of her first communion that this narrative of mine begins.
  1902, John Buchan, The Outgoing of the Tide
3. (Roman Catholicism) A form of ecclesiastical unity between the Roman Church and another, so that the latter is considered part of the former.