A full-body wash taken by Muslims to restore the body to a state of purity.
The total submerging of a person in water as an act of baptism.
The disappearance of a celestial body, by passing either behind another, as in the occultation of a star, or into its shadow, as in the eclipse of a satellite.
An immersion heater.
A smooth map whose differential is everywhere injective, related to the mathematical concept of an embedding.
One's suspension of disbelief while reading, playing a video game, etc. The experience of losing oneself in a fictional world.
Deep engagement in something.
A form of foreign-language teaching where the language is used intensively to teach other subjects to a student.