Cloture is a specific procedure used in legislative debate, most famously in the US Senate, to force an end to discussion so a vote can happen. Closure is the ordinary word for shutting or ending almost anything, from a factory to a difficult chapter of life. If you're not talking about parliament, you almost certainly want closure.
The core difference
Cloture is a narrow parliamentary term for ending debate; closure is the general word for shutting, sealing or resolving.
- cloture — the motion or procedure that ends debate in a legislature so a vote can be taken: The Senate invoked cloture to end the filibuster.
- closure — the shutting of a place, a sense of emotional resolution, or a device that seals something: The factory closure put two hundred people out of work.
How to tell them apart
Both words trace back to the same French root, clôture, which is why they look and sound so alike. But cloture kept a narrow, technical job: it only appears in the context of legislative debate, where a body votes to stop discussing a bill and move to a decision. Closure kept the broad, everyday meaning.
The safest rule is to reach for closure unless you're specifically describing a legislature ending debate. If you see cloture in a headline, it's almost certainly a story about Congress, parliament or a similar assembly.
