new moon

See more synonyms for new moon on Thesaurus.com
noun
  1. the moon either when in conjunction with the sun or soon after, being either invisible or visible only as a slender crescent.
  2. the phase of the moon at this time.

Origin of new moon

before 1000; Middle English; Old English
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for new moon

new moon

noun
  1. the moon when it appears as a narrow waxing crescent
  2. the time at which this occurs
  3. astronomy one of the four principal phases of the moon, occurring when it lies between the earth and the sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

new moon in Science

new moon

[nōō]
  1. The phase of the Moon that occurs when it passes between Earth and the Sun, making it either invisible or visible only as a thin crescent at sunset. See more at moon. Compare full moon.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.