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Webster 1913 Edition

Immersion

Im-mer′sion

,
Noun.
[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.

Webster 1828 Edition

Immersion

IMMER'SION

,
Noun.
The act of putting into a fluid below the surface; the act of plunging into a fluid till covered.
1.
The state of sinking into a fluid.
2.
The state of being overwhelmed or deeply engaged; as an immersion in the affairs of life.
3.
In astronomy, the act of entering into the light of the sun,as a star, so as to be enveloped and invisible to the eye; or the state of being so enveloped. Also, the entrance of the moon into the shadow of the earth, at the commencement of an eclipse; or the state of being enveloped in the shadow. It is opposed to emersion.
The time when a star or planet is so near the sun as to be invisible; also,the moment when the moon begins to be darkened, and to enter the shadow of the earth.

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