Immersion may refer to:
- Immersion therapy, overcoming fears through confrontation
- Baptism by immersion
- Immersion lithography or immersion microscopy, optical techniques in which liquid is between the objective and image plane in order to raise numerical aperture
- Language immersion, a method of teaching a second language in which the target language is used for instruction
- Immersion (mathematics), a smooth map whose differential is everywhere injective, related to the mathematical concept of an embedding
- Telepresence, also called teleimmersion
- Immersion (virtual reality), the state of consciousness where an immersant's awareness of physical self is diminished or lost by being surrounded in an engrossing total environment
- Immersion Corporation, a haptic technology developer
- Immersion heater, a kind of water heater
- Immersion journalism, a style of journalism
- Immersion (album), the third album from Australian electronica and drum and bass group Pendulum
- Immersion (series), a webseries created by Rooster Teeth Productions
- WinRT applications, also called “Immersive”
- "Immersion", a Nebula Award-winning story by Aliette de Bodard