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

Fortunately, a new moon in this area of your chart on June 6 presents you with a clean slate and an opportunity to set the record straight. —Valerie Mesa, Peoplemag, 1 June 2024

The lights were vivid across much of Idaho on May 10, aided by mostly clear skies and a new moon. —Shaun Goodwin, Idaho Statesman, 31 May 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