To congregate is to all come together or gather together.(verb)
At a party when everyone gathers in the kitchen, this is an example of when everyone congregates in the kitchen.
See congregate in Webster's New World College Dictionary
Origin: < L congregatus, pp. of congregare, to congregate < com-, together + gregare, to collect into a flock, gather < grex, a flock: see gregarious
See congregate in American Heritage Dictionary 4
tr. & intr.v. con·gre·gat·ed, con·gre·gat·ing, con·gre·gates
Origin: Middle English congregaten
Origin: , from Latin congregāre, congregāt-
Origin: : com-, com-
Origin: + gregāre, to assemble (from grex, greg-, herd; see ger- in Indo-European roots).
Learn more about congregate