once in a blue moon

Definition of once in a blue moon

  1. :  very rarely It happens once in a blue moon.

Word by Word Definitions

onceplay
  1. :  one time and no more

    :  at any one time :  under any circumstances :  ever

    :  at some indefinite time in the past :  formerly

  1. :  one single time :  one time at least

  1. :  that once was :  former

  1. :  at the moment when :  as soon as

blueplay
  1. :  of the color whose hue is that of the clear sky :  of the color blue (see 2blue 1)

    :  bluish

    :  discolored by or as if by bruising

  1. :  a color whose hue is that of the clear sky or that of the portion of the color spectrum lying between green and violet

    :  a pigment or dye that colors blue

    :  bluing

  1. :  to make blue (see 1blue)

    :  to turn blue

moonplay
  1. :  the earth's natural satellite (see satellite 2a) that shines by the sun's reflected light, revolves about the earth from west to east in about 2912 days with reference to the sun or about 2713 days with reference to the stars, and has a diameter of 2160 miles (3475 kilometers), a mean distance from the earth of about 238,900 miles (384,400 kilometers), and a mass about one eightieth that of the earth

    :  one complete moon cycle consisting of four phases (see 1phase 1)

    :  satellite

  1. :  to spend in idle reverie :  dream

    :  to expose one's naked buttocks to

    :  to spend time in idle reverie :  behave abstractedly


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