fu·mi·ga·tion \ˌfyüməˈgāshən\noun (-s) Etymology: Middle English fumigacioun, from Middle French fumigation, from Late Latin fumigation-, fumigatio, from Latin fumigatus + -ion-, -io -ion : the act or process of fumigating < fumigation of infested but irreplaceable trees > < jeered at the preliminary charity bout as crass fumigation >