Child vs Infant

When to use each in English, with meaning, register, and examples.

Child

Top 1,000 (very common)A1noun

Infant

Top 2,000 (common)C1noun
Most common: Child
 ChildInfant
Pronunciation🇬🇧 /["/tʃaɪld/","/ˈtʃɪldrən/"]/🇺🇸 /["/tʃaɪld/","/ˈtʃɪldrən/"]/🇬🇧 /["/ˈɪnfənt/"]/🇺🇸 /["/ˈɪnfənt/"]/
MeaningA young human who is not yet an adult.A very young baby, usually under one year old.
ExampleThe child played happily in the park.The infant was fast asleep in the cradle.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA1C1
Part of speechnounnoun
Collocationslittle, small, young, have, bear, give birth to, be born, develop, grow, actor, bride, soldier, with child, little, small, young, have, bear, give birth to, be born, develop, grow, actor, bride, soldier, with childyoung, month-old, two-month-old, breastfeed, feed, nurse, death, mortality, child, sudden infant death syndrome
Antonymsadult, grown-upadult, grown-up
Common mistakesConfused with 'children' — remember 'child' is singular., Using 'child' to refer to pets or animals., Mispronouncing it as 'chaild' instead of 'child'.Confusing infant with toddler, which refers to a slightly older age range., Using 'infant' when talking about older children., Incorrectly applying the term in non-medical contexts.
Usage notesCommonly used to refer to anyone under the age of 18. It is appropriate in both formal and informal contexts, but can sound out of place in discussions about adults or professional settings.Used in everyday conversation and in medical contexts. Generally appropriate when discussing babies or child development. Avoid in casual settings where relaxed language is used; 'baby' might be more common.

Frequently asked questions: Child vs Infant

What's the difference between Child and Infant?

Child: A young human who is not yet an adult. Infant: A very young baby, usually under one year old.

Which is more common: Child and Infant?

Child is the most common in everyday English.

Are Child and Infant the same CEFR level?

Child: A1, Infant: C1 on the CEFR scale.

Can I use Child and Infant interchangeably?

Not always. Child and Infant are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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