Simple past tense and past participle of congregate.(verb)
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Use "congregated" in a sentence
"While we were inside, they had once again congregated around the stairs."
"Currently boarding houses, which the city officially calls congregated living spaces, are permitted for dwellings with up to 12 sleeping rooms and 24 occupants if parking and other standards are upheld."
"Among the congregated were The Cato Institute's David Boaz,"