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

Tonight’s Gemini new moon encourages you to make business waves without sacrificing your sense of humor. —Usa Today, USA Today, 14 June 2026

And since this is a super new moon, the moon’s perigee to Earth has a profound effect on our emotions. —Lisa Stardust, Vogue, 10 June 2026

Plan your visit around a new moon, when there will be less light in the night sky. —Evie Carrick, Travel + Leisure, 5 June 2026

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

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