infancy

noun

in·​fan·​cy ˈin-fən(t)-sē 

plural infancies

1

: early childhood

2

: a beginning or early period of existence

3

: the legal status of an infant

Examples of infancy in a Sentence

She was often sick during her infancy.

a skill developed in infancy

She has been a member of the church since its infancy.

Recent Examples on the Web

While his presidency is in its infancy, shaping a positive narrative about the U.S.'s future will prove crucial when America heads into the midterm election cycle in 2026. —Hannah Parry, Newsweek, 25 Mar. 2025

The program is in its infancy, and major questions remain: How long will the process take? —Michaela Mulligan, Sun Sentinel, 24 Mar. 2025

Despite the innovations in technology and design, hypersonic applications for commercial aircraft are in their infancy, with both engines and airframes remaining years away from implementation in that category. —Michael Verdon, Robb Report, 22 Mar. 2025

Smaller babies face problems not only in the short term—an 8- to 20-fold greater risk of death in infancy—but often for the rest of their lives. —Tim Vernimmen, Smithsonian Magazine, 21 Mar. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing infancy

• in one's infancy

Kids Definition

infancy

noun

in·​fan·​cy ˈin-fən-sē 

plural infancies

1

: early childhood

2

: a beginning or early period of existence

Medical Definition

infancy

noun

in·​fan·​cy ˈin-fən-sē 

plural infancies

1

: early childhood

2

: the legal status of an infant

Legal Definition

infancy

noun

in·​fan·​cy ˈin-fən-sē 

plural infancies

1

: the legal status of an infant : minority

2

: the affirmative defense of lacking legal capacity (as to make a contract or commit a crime) because of being too young and especially because one's age is below an age set by statute