Introjection is a term coined by the Hungarian psychoanalyst Sándor Ferenczi in 1909, and refers to the antithesis of projection. Introjection is the hypothesized process of taking in information from the environment and internalising it, making it an object of unconscious fantasies.

Source:

Evans, D. (1996). “An Introductory Dictionary of Lacanian Psychoanalysis” (p.91) New York: Routledge