[haf-moon, hahf-]


the moon when, at either quadrature, half its disk is illuminated.
the phase of the moon at this time.
something having the shape of a half-moon or crescent.

Origin of half-moon

late Middle English word dating back to 1375–1425

Half Moon


the ship in which Henry Hudson made his voyage to explore America in 1609.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for half-moon

Historical Examples of half-moon

  • Guan Yu had a knife shaped like a half-moon which was called the Green Dragon.

  • A half-moon in the sky showed her that the distance down was too far to jump.

    In Apple-Blossom Time

    Clara Louise Burnham

  • The cross and the half-moon were fighting furiously for the upper hand in Spain.

    Legends of the Rhine

    Wilhelm Ruland

  • He was now waiting in his rooms at Half-Moon Street for the boy's arrival.

    The Twelfth Hour

    Ada Leverson

  • A half-moon shone in the sky between the rifts of hurrying clouds.

    Sir Nigel

    Arthur Conan Doyle

British Dictionary definitions for half-moon



the moon at first or last quarter when half its face is illuminated
the time at which a half-moon occurs
  1. something shaped like a half-moon
  2. (as modifier)half-moon spectacles
anatomy a nontechnical name for lunula
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