Dictionary.net

• The moon near the full at about the time of the autumnal equinox, when the daily retardation of its rising is partly counterbalanced by its comparatively rapid motion in north declination, so that it rises for several days together at about the time of sunset.

1895 - Glossary of terms and phrases
By Henry Percy Smith

• n. The moon near the full at the time of harvest in England, or about the autumnal equinox, when it rises nearly at the same hour for several days.

1871 - The Cabinet Dictionary of the English Language