Im*mer"sion (?), 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.
2. Submersion in water for the purpose of
Christian baptism, as, practiced by the Baptists.
3. The state of being overhelmed or deeply
absorbed; deep engagedness.
Too deep an immersion in the affairs of
life.
Atterbury.
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.
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.
