a pipe or hole through which water or gas may escape
a way of expressing or making good use of strong feelings, ideas or energy （感情、思想、精力发泄的）出路；表现机会
She needed to find an outlet for her many talents and interests.
她多才多艺、兴趣广泛，需要找个施展的机会。
Sport became the perfect outlet for his aggression.
运动成为他攻击性情绪的最佳释放途径。