be onto1.■(尤指通过电话)与…取得联系：I've been onto the general manager,he said he would attend the meeting.我与总经理打电话联系过了，他说他会来参加会议。2.■不断要求(或请求)(某人)(做某事)：She's been onto me to buy her a ring for half a year.她要求我给她买一枚戒指，求了半年了。3.■发现(秘密；某人犯罪、做坏事、做错事)：The spy is onto us,we'd better hide.密探发现我们了，我们最好还是躲起来。