Standard Lemma guide

infantilism

noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • Received-Pronunciation: /ɪnˈfæntɪlɪzm/

1

noun

Meaning 1

An emotional dependency on being treated as an infant.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

An appearance like (that of) an infant.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: medicine, pathology, sciences

Examples

  • A craniopharyngioma may produce infantilism.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A paraphilia based on acting like a baby or toddler, sometimes involving being diapered.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: lifestyle, sexuality

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: ABDL

Antonyms: none provided

4

noun

Meaning 4

infantile behavior in mature persons

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: misbehavior, misbehaviour, misdeed

5

noun

Meaning 5

an abnormal condition in which an older child or adult retains infantile characteristics

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: abnormality, abnormalcy

Narrower terms: ateleiosis, ateliosis

History

Etymology

Etymology tree English infantile Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Indo-European *-mos Proto-Indo-European *-mós Ancient Greek -μός (-mós) Ancient Greek -ισμός (-ismós)der. English -ism English infantilism From infantile + -ism.

Across languages

Translations

7 source translations are retained for this English entry.

  • Chinese Mandarin: 幼稚病 (yòuzhìbìng) — emotional dependency
  • Chinese Mandarin: 幼稚症 (yòuzhìzhèng) — emotional dependency
  • Chinese Mandarin: 幼稚化 (yòuzhìhuà) — emotional dependency
  • Finnish: infantilismi — emotional dependency
  • German: Infantilismus — emotional dependency
  • Finnish: infantilismi — paraphilia
  • German: Infantilismus — paraphilia