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Synonyms

critical period

British  

noun

  1. psychol a period in a lifetime during which a specific stage of development usually occurs. If it fails to do so, it cannot readily occur afterwards

"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

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.

Some scientists said that infancy can be a critical period to shape the microbiome, and potentially prevent disease and improve health later on.

From The Wall Street Journal • Mar. 3, 2026

The trajectory of the market will depend on where costs are during a critical period beginning in late January.

From Barron's • Jan. 6, 2026

"We were deeply dismayed by the lack of seriousness shown by some executive colleagues during this critical period, including persistent briefing against others and the leaking of confidential information."

From BBC • Nov. 21, 2025

Scientists have struggled to understand how stars spiraling together during this critical period affects the stars' subsequent evolution.

From Science Daily • Nov. 19, 2024

Yet here, in the dull, hot midsummer days, is the central and critical period of the year’s growth.

From Against War by Erasmus, Desiderius