1
: the act of putting someone or something completely in a liquid or the state of being completely in a liquid
immersion in hot water
2
a
: complete involvement in some activity or interest
We were surprised by his complete immersion in the culture of the island.
b
: a method of learning a foreign language by being taught entirely in that language
He learned French through immersion.
I'm taking an immersion course in German.
Cite this Entry
“Immersion.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/immersion. Accessed 21 Jun. 2026.
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