n. [ L. immersio; cf. F. immersion. ] 1. 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. [ 1913 Webster ] 2. Submersion in water for the purpose of Christian baptism, as, practiced by the Baptists. [ 1913 Webster ] 3. The state of being overhelmed or deeply absorbed; deep engagedness. [ 1913 Webster ] Too deep an immersion in the affairs of life. Atterbury. [ 1913 Webster ] 4. (Astron.) 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. [ 1913 Webster ]
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. [ 1913 Webster ]
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