Noun

1. The moon tinted towards blue as it appears in the sky, caused by dust or smoke in the atmosphere.
2. Something absurd.
   • 1528, Rede Me and Be Not Wrothe, pamphlet

     Yf they say the mone is belewe, we must believe that it is true.

3. The third full moon in a quarter that contains four rather than the usual three full moons.
4. A long time.

Noun

1. The second of two full moons that occur in the same calendar month.