new moon

noun

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This week is the first of this season’s king tides, a natural annual phenomenon where high tides are higher than usual for a few months during full and new moons. Alex Harris, Miami Herald, 9 Sep. 2025 In 2021, the park was recognized as an International Dark Sky Park, and several dark-sky programs are hosted throughout the year, including new moon stargazing. Lydia Mansel, Southern Living, 8 Sep. 2025 That causes a new moon to also align for a solar eclipse. Jamie Carter, Forbes.com, 6 Sep. 2025 But don’t panic — this Virgo new moon eclipse is a healing balm. Dossé-Via Trenou, Refinery29, 29 Aug. 2025 See All Example Sentences for new moon

Word History

First Known Use

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

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

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Cite this Entry

“New moon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/new%20moon. Accessed 16 Sep. 2025.

Kids Definition

new moon

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

More from Merriam-Webster on new moon

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