~ (in sth/doing sth) having influence; persuasive 有影响的; 有说服力的: factors that are influential (ie have an important effect) in reaching a decision 对做出决定有影响（有重要作用）的因素 * an influential speech 有说服力的演说. 
having the status, wealth, etc that enables one to persuade others to do sth 有地位﹑ 财富等的（因而能影响他人做某事）: a committee of influential businessmen, union leaders, etc 由有权势的商界人士﹑ 工会领袖等组成的委员会.