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infancy

American  
[in-fuhn-see] / ˈɪn fən si /

noun

  • infancies
    plural
  1. the state or period of being an infant; very early childhood, usually the period before being able to walk; babyhood.

  2. the corresponding period in the existence of anything; very early stage.

    Space science is in its infancy.

  3. infants collectively.

  4. Law. the period of life to the age of majority, 21 years at common law but now usually 18; minority; nonage.


infancy British  
/ ˈɪnfənsɪ /

noun

  1. the state or period of being an infant; childhood

  2. an early stage of growth or development

  3. infants collectively

  4. the period of life prior to attaining legal majority (reached at 21 under common law, at 18 by statute); minority nonage

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms


Etymology

Origin of infancy

From the Latin word infantia, dating back to 1485–95. See infant, -cy


Explanation

Infancy is the earliest part of a person's life, when they're a baby. It's extremely rare for anyone to remember their own infancy. An amazing amount of growth and development happens during infancy: babies learn to crawl, laugh, and communicate, among many other things. Infancy is vaguely defined, usually including the time from birth to about one year old. You can also use the word to mean "the very beginning of something," so if your lemonade stand is brand new, it's still in its infancy. The word comes from the Latin infantia, "early childhood," and literally, "inability to speak."

Keep Reading on Vocabulary.com

Vocabulary lists containing infancy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The company said almost all of that figure would come from its artificial intelligence business, which was — and is — in its relative infancy.

From Los Angeles Times ● Oct. 27, 2026

As a child at his church's daycare center, James Talarico would intervene to break up fights, according to the pastor who has known him since infancy.

From Barron's ● Oct. 19, 2026

He also recommends white cotton for clothing worn directly against the skin, but cautions that research into cotton dyes is in its infancy.

From The Wall Street Journal ● Sep. 24, 2026

The season is in its infancy but Kane isn't basking in the success of the past 12 months.

From BBC ● Sep. 4, 2026

Their progress was followed by the blank, incurious eyes of second infancy.

From "Brave New World" by Aldous Huxley

We drank Diet Coke through grad school, made sure it was well-stocked at our wedding, painfully restricted our intake through two pregnancies, and only survived two sleepless infancies by the grace of DC.

From Slate ● Aug. 12, 2021

With these programs in their infancies, it’s difficult to determine their effectiveness just yet.

From Slate ● Dec. 19, 2013

Officials in Washington and Boston said that even in their programs’ infancies, they never encountered station failures like New York’s or widespread difficulties with docking.

From New York Times ● Jun. 11, 2013

Pincus also invested in Napster, Facebook, Twitter and Friendster, all of which appeared to be risky in their infancies.

From Reuters ● Dec. 11, 2011

A sister, I think, that should have been Elizabeth, died in both our infancies.

From The Works of Charles and Mary Lamb — Volume 2 Elia and The Last Essays of Elia by Charles Lamb

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