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year zero

British  

noun

  1. the beginning (1975) of the period during which Cambodia was under the control of the Khmer Rouge

  2. the beginning of revolutionary change

  3. the beginning of any new system or regime

"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

Etymology

Origin of year zero

C20: by analogy with Year One of the French Revolutionary calendar

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:

Ground source heat pumps are one of several solutions the UK government is looking at to meet its target of making all new homes built from this year "zero carbon-ready".

From BBC Nov. 5, 2025

Since the end of that 2009 season when the future looked so bright, there had been five losing seasons and, until this year, zero conference titles.

From Washington Times Dec. 28, 2023

If you’re looking for your NBA feel-good story of the year, zero in on a former Washington State Cougar with a stroke pretty enough for an art expo.

From Seattle Times Jun. 4, 2022

In the eights weeks so far this year: zero.

From Los Angeles Times Nov. 26, 2017

Normally this would be no big deal; most calendars of that day started with the year one, not the year zero.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife

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