Home › Words › L › localizationismlocalizationismlocalizationism · noun — the theory that different brain functions can be localized to different physical regions of the brain.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom localization + -ism.nounThe theory that different brain functions can be localized to different physical regions of the brain.Definitions & examples from Wiktionary (CC BY-SA 3.0).