[Middle English subversioun, from Old French subversion, from Late Latin subversiō, subversiōn-, from Latin subversus, past participle of subvertere, to subvert; see subvert.] sub·ver'sion·ar'y adj.
1382, from O.Fr. subversion, from L.L. subversionem (nom. subversio) "an overthrow, ruin, destruction," from pp. stem of subvertere (see subvert). Subversive (adj.) is first recorded 1644; the noun is from 1887.
Main Entry: sub·ver·sion Pronunciation: s&b-'v&r-zh&n Function: noun : a systematic attempt to overthrow or undermine a government or political system by persons working from within; also: the crime of committing acts in furtherance of such an attempt —sub·ver·sion·ary/-zh&-"ner-E/adjective —sub·ver·sive/-'v&r-siv/adj or noun —sub·ver·sive·lyadverb —sub·ver·sive·nessnoun