new moon


Definition of new moon

1 : the moon's phase when it is in conjunction with the sun so that its dark side is toward the earth also : the thin crescent moon seen shortly after sunset for a few days after the actual occurrence of the new moon phase
2 : the beginning of each Jewish month marked by a special liturgy

Examples of new moon in a Sentence

Recent Examples on the Web Nights around the new moon are better than bright full-moon nights. Stephanie Vermillion, National Geographic, "Here’s how to see auroras—from the Great Lakes," 4 Aug. 2020 As the timing of Eid al-Adha depends on the sighting of the new moon, Muslims in different countries sometimes celebrate it on different days, though most follow the lead of Saudi Arabia, as the site of the Hajj. Sara Spary And Amy Woodyatt, CNN, "What is Eid al-Adha, and how is it being celebrated during the pandemic?," 31 July 2020 According to Forbes, this weekend's new moon will block 99.4 percent of the sun at maximum, almost forming a total solar eclipse. Isabel Garcia, House Beautiful, "A Rare "Ring of Fire" Solar Eclipse Is Occurring This Weekend," 16 June 2020 Against that backdrop, Lueders now will oversee NASA's on-going work to test the Artemis program's giant Space Launch System booster and Orion crew capsule, along with development of new moon landers and a small lunar space station. William Harwood, CBS News, "NASA names Kathy Lueders chief of human spaceflight," 12 June 2020 While some Muslims wait to see the moon themselves, many either use the calculated time of the new moon, or base it on the declaration made in Saudi Arabia or Turkey. N'dea Yancey-bragg, USA TODAY, "When is Eid al-Fitr? Muslims to celebrate one of the biggest holy festivals amid coronavirus," 22 May 2020 My fall trip on Lake St. Clair is always planned around the new moon, weather permitting. Kristtine Fischer, Outdoor Life, "How to Catch Big Fish from a Kayak," 6 May 2020 At first, astronomers thought the new moon could be a piece of space junk, a rocket part discarded after a successful launch. Marina Koren, The Atlantic, "Earth Has Had a Secret Second Moon for Months Now," 27 Feb. 2020 The good news is that the new moon will be on July 31., "Delta Aquariid and Perseids meteor showers will bring ‘a fun summer show’ to Oregon’s night skies," 26 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'new moon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of new moon

before the 12th century, in the meaning defined at sense 1

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Time Traveler for new moon

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The first known use of new moon was before the 12th century

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Last Updated

11 Aug 2020

Cite this Entry

“New moon.” Dictionary, Merriam-Webster, Accessed 13 Aug. 2020.

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More Definitions for new moon

new moon


English Language Learners Definition of new moon

: the moon when it is completely dark

new moon


Kids Definition of new moon

1 : the moon's phase when its dark side is toward the earth
2 : the thin curved outline of the moon seen shortly after sunset for a few days after the new moon

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More from Merriam-Webster on new moon

Spanish Central: Translation of new moon

Nglish: Translation of new moon for Spanish Speakers Encyclopedia article about new moon

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