What does it mean for something to be curtailed?

To curtail something means to reduce its size, length, or extent. This term is often used in contexts where activities, processes, or availability are limited or cut short. In practical terms, if a city were to curtail its public services, it would be decreasing the number of services offered or their frequency. Therefore, the definition aligns precisely with the concept of reducing something, making it the best choice among the provided options.

The other choices suggest either an increase in size or significance, or irrelevance, which does not align with the fundamental meaning of the term "curtail."