/ˈɒntə;before vowels ˈɒntʌ||; ˈɑntə/(also on to) prep to a position on sth 到…之上: The cat jumped onto the sofa. 猫儿跳到沙发上面。The bottle fell off the table onto the floor. 瓶子从餐桌掉到地板上。The crowd ran onto the pitch. 群众跑到球场上。 be onto sb(informal 非正式) to have found out about sth illegal that sb is doing 发现某人干非法勾当: The police were onto the car thieves. 警方发现了那几个汽车窃贼。 be onto sth to have some information, etc that could lead to an important discovery 掌握重要证据或线索