infant

1 of 2

noun

in·​fant ˈin-fənt 

1

: a child in the first period of life

2

: a person who is not of full age : minor

infant

2 of 2

adjective

1

: intended for young children

2

: being in an early stage of development

3

: of, relating to, or being in infancy

Synonyms

Noun

• child
• baby
• toddler
• newborn

Examples of infant in a Sentence

Noun

a study of health problems that can affect young infants

He showed us a picture of his infant daughter.

Adjective

She is an infant teacher.

Recent Examples on the Web

Noun

Once the infant and Hamida are reunited, the baby’s health is restored. —JSTOR Daily, 30 Oct. 2025

That line belongs to Triss Merigold, who is shocked when Yennefer pulls a small jade statue out of her decolletage and transforms it back into Francesca Findabair, the elven queen still grieving the loss of both her husband and her infant heir. —Scott Meslow, Vulture, 30 Oct. 2025

Adjective

During the formative phase of the infant American republic, when its survival was still problematic, iconic founders performed a valuable function as reliable sources of unquestioned wisdom, a veritable gallery of Delphic oracles available on demand. —Literary Hub, 28 Oct. 2025

According to the American Academy of Pediatrics, the leading cause of infant suffocation during sleeping hours is soft bedding. —Bestreviews, Mercury News, 9 Sep. 2025

Word History

Etymology

Noun

Middle English enfaunt, from Anglo-French enfant, from Latin infant-, infans, from infant-, infans, adjective, incapable of speech, young, from in- + fant-, fans, present participle of fari to speak — more at ban entry 1

First Known Use

Noun

14th century, in the meaning defined at sense 1

Adjective

circa 1586, in the meaning defined at sense 1

Phrases Containing infant

• infant mortality
• infant school
• sudden infant death syndrome

Kids Definition

infant

noun

in·​fant

ˈin-fənt

: a child in the first period of life

infant adjective

Medical Definition

infant

noun

in·​fant ˈin-fənt 

1

a

: a child in the first year of life : baby

b

: a child several years of age

2

: a person who is not of full age : minor

infant adjective

Legal Definition

infant

noun

in·​fant ˈin-fənt 

: a person who is not of the age of majority : minor compare adult