harvest moon noun2 •The first full moon of autumn by a tropical year.A silvery cloud drifted over the mountains that surrounded him, its edges glowing with ruddy light cast from the harvest moon cradled between two peaks. — 2003 •The full moon nearest the autumn equinox, when the moon rises the latest and lowest in the sky and seems to appear the biggest, as seen from the Northern Hemisphere.Round and red as the harvest moon through the mist of the marshes — 1847 formsharvest moons
