im ‧ mer ‧ sion /ɪˈmɜːʃ ə n, -ʒ ə n $ ɪˈmɜːrʒ ə n/ BrE AmE noun
1 . [uncountable] the action of immersing something in liquid, or the state of being immersed
immersion in
his near-fatal immersion in the icy Atlantic Ocean
2 . [uncountable] the fact of being completely involved in something you are doing
immersion in
my immersion in black music and culture
3 . [uncountable] technical the language teaching method in which people are put in situations where they have to use the new language
4 . [countable] British English informal an immersion heater