Noun | 1. | phase of the moon - a time when the Moon presents a particular recurring appearance phase - (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun); "the full phase of the moon" period, period of time, time period - an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period" new moon, new phase of the moon - the time at which the Moon appears as a narrow waxing crescent half-moon - the time at which the Moon is at first or last quarter when half its face is illuminated full, full moon, full phase of the moon, full-of-the-moon - the time when the Moon is fully illuminated; "the moon is at the full" |