| OMNI | Omnidirectional | 全方位的 |
| OMNI | Operating Missions as a Node on the Internet (NASA networking project) | 作为互联网节点运行任务（NASA网络项目） |
| OMNI | Output Matching Network Impedance | 输出匹配网络阻抗 |
| OMNI | Oppose Militancy & Neutralize Invasion (Gundam Seed anime) | 反对战斗性和中和入侵(高达种子动画) |
| OMNI | Opportunities for Micronutrient Interventions Project | 微量营养素干预项目的机会 |
| OMNI | Organising Medical Networked Information | 组织医疗网络信息 |
| OMNI | One Model, Numerous Identities | 一种模式，多种身份 |
| OMNI | Operation and Maintenance of Navigation Installations | 导航装置的操作和维护 |
| OMNI | Overseas Moving Network Institute | 海外移动网络研究所 |
| OMNI | Open Minds, New Ideas (Poland Spring, ME summer camp) | 开放思维，新想法（波兰春季，ME夏令营） |
| OMNI | Organizing Medical Networked Information | 组织医疗网络信息 |
| OMNI | Older Men New Ideas | 老年人的新想法 |
| OMNI | Oppose Military And Neutralize Invasion | 反对军事和中立侵略 |
| OMNI | Open Minds New Ideas | 开放思维新想法 |
| OMNI | Oppose Militancy, Neutralize Invasion | 反对好战，中立侵略 |
| OMNI | Opera Nazionale Maternita e Infanzia | 国家歌剧院 |