# immersion

/ˌɪˈmɝʒən/ (US) · /ɪmˈɜːʃən/ (UK)

Source: https://englishreference.com/word/immersion
Updated: 2026-08-08

## Senses

### 1. physical submergence

noun · CEFR B2

the act of putting something completely under the surface of a liquid.

For teachers: the act of dipping or submerging something completely into a liquid.

- The waterproof watch is designed for total immersion in water up to fifty metres.
- The process requires total immersion of the metal parts in a chemical bath to ensure the coating reaches every crevice.

### 2. deep involvement

noun · CEFR B2

the state of being completely involved in something so that you do not notice anything else.

For teachers: the state of being deeply engaged or involved in an activity, environment, or interest.

- His immersion in his work meant he often forgot to eat lunch.
- The virtual reality headset provides a level of immersion that makes players feel as though they are physically present in the game world.

### 3. language learning

noun · CEFR B2 · Academic

a way of learning a language by only using that language for everything you do.

For teachers: a method of foreign-language instruction in which the target language is used as the sole medium of communication and instruction.

- She spent the summer in a French immersion program to improve her speaking skills.
- Total immersion programs are often more effective than traditional classroom settings because they force students to navigate daily life in the target language.

### 4. water heater

noun · CEFR B2 · British English · Informal

an electric device used to heat water in a tank.

For teachers: an electric water heater that is placed inside a water tank to heat the water directly.

- Don't forget to turn off the immersion after you have your shower.
- The landlord promised to fix the immersion, as the tenants had been without hot water for three days.

### 5. mathematical mapping

noun · CEFR C2 · Technical

a special way of matching points from one shape to another in math.

For teachers: a smooth map between manifolds whose differential is everywhere injective.

- The professor explained how an immersion differs from an embedding in geometry.
- In differential topology, an immersion is a differentiable map between manifolds whose derivative is everywhere injective.

### 6. astronomical disappearance

noun · CEFR C2 · Technical

when a star or planet disappears behind another object in space.

For teachers: the disappearance of a celestial body as it passes behind another or into its shadow.

- The telescope captured the exact moment of the moon's immersion into the Earth's shadow.
- Astronomers calculated the precise timing of the immersion to better understand the satellite's orbital path.

## Examples

- Total immersion is the fastest way to learn a new language.
- The program offers a week of cultural immersion where students live with local families and participate in daily traditions.
- The artist's latest installation uses spatial audio and virtual reality to create a sense of total immersion, blurring the boundaries between the viewer and the digital landscape.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.