The act of making a previously legal activity illegal.(noun)
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Use "criminalization" in a sentence
"The subtle use of legal pressure to silence dissent in Arab countries, and what it describes as the criminalization of journalism in Russia and central Asia."
"We'll be taking you to Phoenix, Atlanta, and Los Angeles, where tens of thousands marched in support of amnesty for illegal aliens and protesting what they call criminalization of illegal immigration."
"The result is what they call the criminalization of unacceptable but otherwise normal rebellious behavior."