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 month began with a new moon in Sagittarius, shaking up your fourth house of home, family and emotional foundations. —Valerie Mesa, People.com, 7 Dec. 2024

During the days leading up to, on, or just after a new moon, the skies are at their darkest. —Stephanie Vermillion, Travel + Leisure, 3 Dec. 2024

The month begins with a new moon in adventurous Sagittarius on December 1, a powerful time to set expansive intentions and think big for your future. —Meghan Rose, Glamour, 1 Dec. 2024

Humans are one step closer to building a base on the moon after a new moon cave was discovered not far from the Apollo 11 landing site. —Kimberlee Speakman, Peoplemag, 16 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