A Scotch errand boy, porter, or messenger.
Having the ascendency over others; superior in strength, influence, or authority; prevailing; as, a predominant color; predominant excellence. Those help . . . were predominant in the king's mind. Bacon. Foul subordination is predominant. Shak. Syn. -- Prevalent; superior; prevailing; ascendant; ruling; reigning; controlling; overruling.