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

Read on for how December's new moon will affect your zodiac sign, according to Kyle Thomas' predictions. —Skyler Caruso, People.com, 29 Nov. 2024

For the rest of the world, today is merely a new moon, a lunar phase during which the moon is invisible and the night skies are free from moonlight. —Jamie Carter, Forbes, 30 Sep. 2024

August's new moon peaks on Aug. 4, a few weeks ahead of the full Sturgeon Moon on Aug. 19 Comments Another new moon is approaching! —Skyler Caruso, Peoplemag, 1 Aug. 2024

Next up: Apollo’s twin NASA aims to send four astronauts around the moon next year — part of a new moon program named Artemis after Apollo’s twin sister in Greek mythology. —Marcia Dunn, Orlando Sentinel, 20 July 2024

Word History

First Known Use

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

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