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(ĭn′fən-tl-ĭz′əm, ĭn-făn′tl-)
1. The existence of juvenile physical or psychological characteristics in an adult, as from failure to develop secondary sexual characteristics.
a. Marked immaturity, as in behavior or character.
b. An infantile act or remark.
3. A condition in which one desires to act or be treated like a baby, sometimes associated with a paraphilia.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Psychology) psychol
a. a condition in which an older child or adult is mentally or physically undeveloped
b. isolated instances of infantile behaviour in mature persons
2. childish speech; baby talk
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈɪn fən tlˌɪz əm, -taɪˌlɪz-, ɪnˈfæn tlˌɪz əm)

1. the persistence in an adult of markedly childish anatomical, physiological, or psychological characteristics.
2. an infantile act, trait, etc.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


the condition of one who is not a child acting abnormally childlike. — infantility, n.infantilistic, adj.
See also: Psychology
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.infantilism - an abnormal condition in which an older child or adult retains infantile characteristics
abnormalcy, abnormality - an abnormal physical condition resulting from defective genes or developmental deficiencies
ateleiosis, ateliosis - a form of infantilism characterized by physical underdevelopment but normal intelligence
2.infantilism - infantile behavior in mature persons
misbehavior, misbehaviour, misdeed - improper or wicked or immoral behavior
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


[ɪnˈfæntɪˌlɪzəm] Ninfantilismo m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


n. infantilismo, manifestación de características infantiles en la edad adulta.
Inmadurez extrema.
English-Spanish Medical Dictionary © Farlex 2012