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

Eclipse seasons last about 37 days, a period of time in which the alignment of the sun and moon can allow for an eclipse to take place at both the full and new moon phases within that more than 5-week period. —Joe Rao, Space.com, 26 Mar. 2025

Make room in your life for play and the pursuit of passion, because a wealth of creativity and romance is at your fingertips now—especially during the earthy new moon on April 27. —Nina Kahn, StyleCaster, 24 Mar. 2025

The first quarter moon urges us to give extra TLC and slightly augment our new moon intentions, if necessary. —Lisa Stardust, People.com, 14 Mar. 2025

But of course, the main draw is the glorious Milky Way, which is most striking during a new moon phase. —Symiah Dorsey, Southern Living, 27 Feb. 2025

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