- The act of immersing, or the state of being immersed; a
sinking within a fluid; a dipping; as, the immersion of Achilles in the
Styx. - Submersion in water for the purpose of Christian
baptism, as, practiced by the Baptists. - The state of being overhelmed or deeply absorbed; deep
engagedness. - The dissapearance of a celestail body, by passing either
behind another, as in the occultation of a star, or into its shadow, as
in the eclipse of a satellite; -- opposed to emersion.