fortification
(noun)
noun
1. defensive structure consisting of walls or mounds built around a stronghold to strengthen it
Similar word(s): munition
Definition categories: man–made, defence, defense
2. the art or science of strengthening defenses
Definition categories: thought, art, artistry, prowess
3. the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food)
Definition categories: act, enrichment