criminalisation /ˌkɹɪmɪnəlaɪzˈeɪʃən/ noun2 •The act of making a previously legal activity illegal, the act of making something a criminal offence.And of course, s/m players who participate in breath play will also be more vulnerable to criminalization under such a new law. — 2014 •The act of turning someone into a criminal by making their activities illegal. formscriminalisations