(transitive) To place within a fluid (generally a liquid, but also a gas). / (transitive) To involve or engage deeply. / (transitive, mathematics) To map into an immersion.

(obsolete) Immersed; buried; sunk.

The total submerging of a person in water as an act of baptism. / Deep engagement in something. / (Britain, Ireland, informal) An immersion heater.

Under the surface of a liquid; sunk. / Deeply involved.

simple past tense and past participle of immerse

Not susceptible to harm if immersed in water.

(transitive) To plunge into, under, or within anything, especially a fluid; to dip; to immerse. / (intransitive) To disappear by entering into any medium, as a star into the light of the sun.

present participle of immerse

Third-person singular simple present indicative form of immerse

A style of education in which students are taught simultaneously in two languages: a "primary" language which is dominant in the given country (in which the immersion is taking place), plus a "secondary" language which is the student's native language.