To bring together
To come together
Cattle sometimes congregate in cold weather around a burning coal seam and enjoy the warmth.
(solar) stars show no tendency to congregate in the galactic plane.
however, congregate towards the galactic plane.
They usually congregate in the larger towns, though in northern Moldavia there are a few purely Jewish villages, recalling those of Poland.
Many of the gulls congregate in vast numbers to breed, whether on rocky cliffs of the sea-coast or on healthy islands in inland waters.