immersion Meaning, Definition & Usage

  1. noun sinking until covered completely with water
    submersion; submergence; submerging.
  2. noun (astronomy) the disappearance of a celestial body prior to an eclipse
    ingress.
  3. noun complete attention; intense mental effort
    absorption; concentration; engrossment.
  4. noun a form of baptism in which part or all of a person's body is submerged
  5. noun the act of wetting something by submerging it
    ducking; submersion; dousing.

WordNet

Im*mer"sion noun
Etymology
L. immersio; cf. F. immersion.
Definitions
  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.

Webster 1913