col·lec·ti·vize collectivizes collectivizing collectivized in BRIT, also use collectivise If farms or factories are collectivized, they are brought under state ownership and control, usually by combining a number of small farms or factories into one large one. Most large businesses were collectivized at the start of the war He forced the country to collectivize agriculture. large collectivised farms. + collectivization col·lec·tivi·za·tion the collectivisation of agriculture. to join privately owned farms or businesses together, so that they can be owned by the government in a Communist political system