Im*mer"sion (?), n. [L. immersio; cf. F. immersion.]
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.
Too deep an immersion in the affairs of life.
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.
Immersion lens, a microscopic objective of short focal distance designed to work with a drop of liquid, as oil, between the front lens and the slide, so that this lens is practically immersed.
© Webster 1913.