(in fan′ti liz′əm; also in′fən-)
- immature or childish behavior
- Psychol. an abnormal state in which such behavior persists into adult life: it is marked by retarded mental and physical growth and by failure to mature sexually
See infantilism in American Heritage Dictionary 4
- A state of arrested development in an adult, characterized by retention of infantile mentality, accompanied by stunted growth and sexual immaturity, and often by dwarfism.
a. Marked immaturity, as in behavior or character: “infantilism, which is the subtext of so much American cinema and culture” (John Simon).
b. An infantile act or remark.
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