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

Always check with the moon From last quarter moon to just beyond new moon, there's a 10-night stretch when evening skies are free from bright moonlight. —Jamie Carter, Space.com, 3 May 2026

This new moon is special for you, so make a wish! —Valerie Mesa, PEOPLE, 1 May 2026

Clarity arrives around the Taurus new moon on May 18, also the day your ruling planet, Venus, shifts into more comfortable territory. —Steph Koyfman, Condé Nast Traveler, 29 Apr. 2026

The Aries new moon kickstarts your ability to build security intentionally through conscious effort. —Usa Today, USA Today, 17 Apr. 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