a sound, e.g. from a horn or electronic device, that serves as a signal or warning
to sound a horn
to make a beep
to cause (a horn, etc) to sound
英语词典包含66266条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。