To cut short or reduce. See Synonyms at shorten.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "curtail" in a sentence
"Booming M&A activity has helped to drive Australia's stock market to a record, but these changes may in the short term curtail that activity."
"A poor African, behind the pulpit, who perhaps had seen pictures of the devil with a long tail and hoofs, misapprehended the meaning of the word curtail, and responded, "Amen! may it be cut right, smack, smooth, short off.""
"Freedom is not absolute, of course, but the worst atrocities in history have been carried out when authorities decided to "curtail" activities "in the interest of the common good.""