(v. i.) To shout for, or otherwise noisly applaud or encourage, a contestant, as in sports; hence, to wish earnestly for the success of some one or the happening of some event, with the superstitious notion that this action may have efficacy; -- usually with for; as, the crowd rooted for the home team.
ROOT
Meaning of ROOT in English
Webster's English dictionary. Английский словарь Webster. 2012