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
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Embrace luxury under today’s Taurus new moon – by your own definition. Usa Today, USA Today, 16 May 2026 With a new moon on Saturday, May 16, the sky will be free from moonlight all weekend, allowing faint aurora to be seen. Jamie Carter, Forbes.com, 16 May 2026 In the coming nights, Earth's satellite will disappear from the predawn sky ahead of its new moon phase on May 16, while Mars and Saturn subtly drift away from one another among the stars of the constellation Pisces. Anthony Wood, Space.com, 12 May 2026 This new moon is special for you, so make a wish! Valerie Mesa, PEOPLE, 1 May 2026 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 21 May. 2026.

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

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