fortification

/ˌfɔrtəfəˈkeɪʃən/
noun
  1. A structure built to defend a place against attack, such as a wall, tower, or ditch.
    • The castle's fortification included a deep moat and high stone walls.
    • Soldiers reinforced the fortification with sandbags.
    • The ancient fortification protected the city from invaders.
  2. The act of strengthening or making something more secure.
    • The fortification of the building's windows helped it survive the storm.
    • The fortification of the network against hackers is a top priority.
    • They worked on the fortification of the dam to prevent flooding.
  3. The addition of vitamins or minerals to food to improve its nutritional value.
    • Fortification of breakfast cereals with iron helps prevent anemia.
    • The fortification of milk with vitamin D is common in many countries.
    • The fortification of flour with folic acid has reduced birth defects.
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