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.
Rising a few weeks after this April's full pink moon, this month's new moon peaks at 12:31 p.m. Skyler Caruso, People.com, 26 Apr. 2025 Earth's moon, meanwhile, will form the impish smiling mouth of the face, appearing as a waning crescent ahead of its impending new moon phase on April 27. Anthony Wood, Space.com, 24 Apr. 2025 Channel this passion into some focused new moon intentions on April 27, but don’t let yourself be driven by a sheer need to conquer. Nina Kahn, StyleCaster, 24 Mar. 2025 Back in 2024, astronomers announced one new moon for Uranus (S/2023 U1) and two new moons for Neptune (S/2002 N5 and S/2021 N1). Jack Knudson, Discover Magazine, 17 Mar. 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 20 May. 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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