deconstructionism
noun
de·con·struc·tion·ism ˌdē-kən-ˈstrək-shə-ˌni-zəm 
: deconstruction sense 1
deconstructionist
ˌdē-kən-ˈstrək-shə-nist
adjective or noun 
Example Sentences
Recent Examples on the Web With Foucault, deconstructionism evolved into postmodernism, a more general critique of the cognitive modes that had been strongly associated with classical liberalism for centuries. 
Francis Fukuyama, Harper’s Magazine , 27 Apr. 2022 The effort by the extreme left to not only silence the scientific community but to reject the validity of the scientific method is of course the logical and inevitable result of the postmodernist embrace of moral relativism and deconstructionism. WSJ, 9 Oct. 2017
Francis Fukuyama, Harper’s Magazine , 27 Apr. 2022 The effort by the extreme left to not only silence the scientific community but to reject the validity of the scientific method is of course the logical and inevitable result of the postmodernist embrace of moral relativism and deconstructionism. WSJ, 9 Oct. 2017 Word History
First Known Use
1977, in the meaning defined above