| ONO | Or Near Offer | 价格有商量 |
| ONO | order number | 定单号数 |
| ONO | Or Near Offer(s) | 或接近报价 |
| ONO | Or Nearest Offer | 或最近的报价 |
| ONO | Ostnordost (German; East-North-East) | Ostnordost(德语;东北偏东) |
| ONO | Our Night Out | 我们的夜晚 |
| ONO | Over N Out (gaming clan) | 超过N Out(游戏族) |
| ONO | Original Network Operator (mobile communications operator) | 原始网络运营商(移动通信运营商) |
| ONO | Organization of News Ombudsmen | 新闻监察员组织 |
| ONO | Ovest-Nord-Ovest (Italian: West-North-West) | 奥韦斯特北部奥韦斯特(意大利语:West North West) |
| ONO | Oxide/Nitride/Oxide | 氮化硅/氧化氧化/ |
| ONO | One Night Only (event) | 仅限一晚(活动) |
| ONO | Ontgiften, Neutraliseren en Ontwateren (Dutch: decontamination, neutralization, dehydration) | Ontgiften、Neutraliseren en Ontwateren(荷兰语:去污、中和、脱水) |