definition of
fortification

[1] #1 fortification n. [munition] defensive structure consisting of walls or mounds built around a stronghold to strengthen it. wn

[2] #2 fortification n. the art or science of strengthening defenses. wn

[3] #3 fortification n. the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food). wn