A measure or action taken to counter or offset another one.(noun)
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 "countermeasure" in a sentence
"So to get Lennon out of the country, the strategic countermeasure is to deport Lennon so he won't be able to take this tour that would register young voters."
"It turns out that all it takes to get around the BBC's countermeasure is to structure the request header using the same quirks as an iPhone."
""With this action, BioThrax remains a critical and long-term countermeasure for the US government," said Fuad El-Hibri, chairman and chief executive officer of Emergent BioSolutions."