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

Jupiter’s debut in Gemini on May 25 continues to encourage you to explore your inner world, arriving just in time for an introspective new moon in Gemini on June 6. —Valerie Mesa, Peoplemag, 21 May 2024

Tune into the Taurus new moon on the 8th which is prime time to get in touch with what needs to change. —Debbie Frank, Peoplemag, 8 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