1hear something on the grapevineRUMOUR/RUMORto hear about something because the information has been passed from one person to another in conversation 从传闻听到某事
I heard about his resignation on the grapevine.
他辞职的事我是从小道消息听来的。
2.HBPa climbing plant on which grapes grow 葡萄藤SYN vine