A détournement (French: [detuʁnəmɑ̃]), meaning "rerouting, hijacking" in French, is a technique developed in the 1950s by the Letterist International, and later adapted by the Situationist International (SI), that was defined in the SI's inaugural 1958 journal as "[t]he integration of present or past artistic productions into a superior construction of a milieu. In this sense there can be no situationist painting or music, but only a situationist use of those means. In a more elementary sense, détournement within the old cultural spheres is a method of propaganda, a method which reveals the wearing out and loss of importance of those spheres."
The brand marketing specialist Douglas B. Holt defined it as "turning expressions of the capitalist system and its media culture against itself".