ges·tion \ˈjes(h)chən\noun (-s) Etymology: Latin gestion-, gestio, from gestus (past participle of gerere to bear, act, manage) + -ion-, -io -ion — more at cast 1.: the act or process of carrying on : conduct, management < that participation in the gestion of affairs which his office made incumbent on him — Thomas Jefferson > 2.Roman & civil law: management of or interference with the business or affairs of another without authority : intermeddling