| 2 invalid; null and void: |
| | 逾期无效 invalid after the specified date |
| | 宣布合同无效 declare a contract invalid (or null and void); invalidate (or nullify) a contract |
| | 宣布选举无效 nullify an election |
| | 无效分蘖 【农】 ineffective tillering |
| | 无效劳动 fruitless labour; labour lost |
| | 无效论证 invalid argument |