To be superior in strength; hence, to have or gain the advantage, as in a contest or matching of strength; be victorious; triumph; have the upper hand: often followed by over or against.To have or exert superior influence; have a controlling or overmastering authority; be predominant.To operate effectually; be effective; succeed, especially in persuading, inducing, or convincing.To be in force; extend with power or effect; hence, to be prevalent or current.To be currently received or believed; be established.To avail; be of value or service.To avail: used reflexively.