| TDY | Temporary Duty | 短时工作方式,临时性负载 |
| TDY | Testis-Determining factor on Y | 睾丸决定Y的因素 |
| TDY | Teledyne Technologies, Inc. | Teledyne Technologies,Inc.公司。 |
| TDY | Today Dads Yonder | 今天爸爸在那边 |
| TDY | Temporary Duty (US military) | 临时任务(美军) |
| TDY | Temporary Duty Yonder (military slang) | 临时值班(军事俚语) |