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

The Lunar New Year is one major example, falling on the second new moon after the winter solstice. —Doris Elin Urrutia, Space.com, 30 May 2026

Venus enters Leo on June 13, followed by a new moon in Gemini on June 14, together sparking a more social, expressive, and outward-facing chapter. —Kirah Tabourn, Condé Nast Traveler, 28 May 2026

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

Word History

First Known Use

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

Rhymes for new moon

• attune
• baboon
• balloon
• bassoon
• buffoon
• cartoon
• cocoon
• festoon
• gaboon
• harpoon
• immune
• impugn

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