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 occultation takes place just two days after the April 17 new moon. —Anthony Wood, Space.com, 19 Apr. 2026

The Aries new moon kickstarts your ability to build security intentionally through conscious effort. —Usa Today, USA Today, 17 Apr. 2026

Read on to find out what this new moon has in store for you. —Tabitha Parent, PEOPLE, 17 Apr. 2026

There will be several events across the region where the public can stargaze and celebrate the night skies, and this year’s celebration coincides with a meteor shower and a new moon. —Carlos Rico, San Diego Union-Tribune, 8 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