| 1 great (or major) event; important matter; major issue: |
| | 头等大事 a matter of prime (or paramount) importance |
| | 关心国家大事 concern oneself with affairs of state |
| | 当前国际政治中的一件大事 a major event in current international politics |
| | 你们要把它作为一件大事去做。 You should make this a top priority. |