The midpoint of an event is the time halfway between the beginning and the end of it. She has not yet reached the midpoint of her life. = middle. a point that is half of the way through or along something midpoint of
The point on the zodiac between two planets or other astrologically significant points, believed to be sensitive to aspects, transits and progressions in the same way as the individual planets Usually interpreted as a kind of mini-conjunction between the planets involved, the midpoints are believed to be particularly important if they aspect a third planet in the horoscope