Def.1, adj,: A situation in which life as it is lived was made better by the effects of cannabis.
Def.2,adj,: The best description of a place smelling of cannabis.
Def.1: *Matt goes to McDonalds and orders The Best McDonald's Meal Ever*
Matt: damn this is chronically enhanced, it taste's so good high.
Def.2: *Wes walks outside into a backyard of people smoking weed*
Wes: "Yo it smells chronically enhanced out here!"