Here are some more specific definitions:
* To reduce in extent or quantity: "The government has had to curtail spending due to the economic downturn."
* To cut short or abbreviate: "The play was curtailed due to technical difficulties."
* To restrict or limit: "The company's growth was curtailed by a lack of funding."
Examples:
* "We had to curtail our vacation plans because of a family emergency."
* "The doctor advised the patient to curtail their sugar intake."
* "The company curtailed its production due to a decline in demand."