Mutawātir (متواتر) is a Hadith transmitted in every generation by so many narrators that their all joining in falsehood is impossible in the ordinary course of events.
• First condition: the narrators are very numerous.
• Second condition: their number is such that neither agreeing together on a lie nor all coincidentally reporting the same falsehood is considered possible.
Simply saying “there are several narrators” is therefore not enough.