| Acronym | Definition |
|---|
| ONH➣Optic Nerve Hypoplasia |
| ONH➣Optic Nerve Head (ophthalmology) |
| ONH➣Ongkos Naik Haji (Indonesian: Hajj Fees Increases) |
| ONH➣Office of Naval History (US Navy) |
| ONH➣Osaka National Hospital (Osaka, Japan) |
| ONH➣Old Naval Hospital |
| ONH➣Opera New Hampshire |
| ONH➣Operation New Hope, Inc. (est. 1999; Jacksonville, FL) |