1. 与. . 相接触,被认命：get on 相处融洽 | get onto 与. . 相接触,被认命 | sit in 代替,取代

2. 转入(另一话题或活动),同...联系：cut across 超近路穿过,对直通过 | get onto 转入(另一话题或活动),同...联系 | go without 不享受,没有...而将就对付

3. 上(船)：14. get on for接近 | 15. get onto上(船) | 16. get out of从(车等)下来

4. 与(某人)接触：get on for 接近 | get onto 与(某人)接触 | get out 从...拿出,离开

verb

1. understand, usually after some initial difficulty

e.g. She didn't know what her classmates were plotting but finally caught on

Synonym: catch onget wisetumblelatch oncotton ontwigget it