1 [I,T] to cry or complain in a loud, high voice, especially because you are sad or in pain 号啕大哭，大声哭诉（尤指因悲伤或疼痛）

2 [I] (used about things) to make a sound like this （指事物）发出似大哭的声音: sirens wailing in the streets outside 外面街头警报器声音大作 wail noun [C]: a wail of anguish/despair/distress 痛苦╱绝望╱悲伤的哀号the wail of sirens 警报的长鸣