Ordinance and ordnance look similar, but they mean very different things.
Ordinance is a law, rule, or official order, often created by a city or local government. You will usually see it in legal or civic contexts. For example: The council approved a new parking ordinance.
Ordnance refers to military weapons, ammunition, or related equipment. It belongs in defense and military writing. For example: The team was trained to handle unexploded ordnance.
A quick way to remember the difference is context:
- If the sentence is about government rules or local laws, use ordinance.
- If the sentence is about bombs, artillery, ammunition, or military gear, use ordnance.
Compare these examples:
- The town updated its noise ordinance.
- The museum displayed historical ordnance.
Even though the words differ by just one letter, they are not interchangeable. Choosing the right one makes your meaning clear right away.
