| DFN | Day for Night (cinematography) | 白昼换黑夜（电影摄影） |
| DFN | Deutsches Forschungsnetz | 德国Forschungsnetz |
| DFN | Digital Freedom Network | 数字自由网络 |
| DFN | Define Normal (band) | 定义法线（带） |
| DFN | Dedicated Frogans Network | 专用青蛙网络 |
| DFN | Dual Flat No-lead package | 双扁平无引线封装 |
| DFN | Discrete Fracture Network (geology/geophysics) | 离散岩体裂隙网络(地质/物理) |
| DFN | Dual Flat No-lead (electronics) | 双平面无引线（电子设备） |
| DFN | Definition | 释义 |
| DFN | done for now | 暂时完成 |
| DFN | Deafness | 耳聋 |
| DFN | Dysfunctional Family Night (SOAPnet TV channel) | 功能失调家庭之夜（SOAPnet电视频道） |