To reach its highest point of altitude; to come to the meridian; to be vertical or directly overhead.
To reach the highest point, as of rank, size, power, numbers, etc.
end, especially to reach a final or climactic stage; "The meeting culminated in a tearful embrace"
bring to a head or to the highest point; "Seurat culminated pointillism"
reach the highest or most decisive point
of a celestial body: reach its highest altitude or the meridian
reach its final or highest point; bring to its highest or final point.
To reach one's highest point. Meteor showers are best seen when their radiants culminate in the sky when they seen highest above the horizon. This occurs either in the due north or south directions, depending on a radiant's declination and the observer's latitude.