A communion is an intimate connection. Many people enjoy hiking in the woods in order to have a sort of communion with nature.
When you connect in a meaningful way with something, or intimately share your feelings with someone, you experience a communion. The word implies a deep connection, particularly a spiritual one. A Communion, with a capital C and also called Holy Communion, is a Christian religious service involving consecrated bread and wine. The Latin root of communion is communionem, meaning "fellowship, mutual participation, or sharing."