fortification

US /ˌfɔːr.t̬ə.fəˈkeɪ.ʃən/
UK /ˌfɔːr.t̬ə.fəˈkeɪ.ʃən/
"fortification" picture
1.

a defensive wall or other reinforcement built to strengthen a place against attack

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The ancient city was protected by strong fortifications.
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They began building new fortifications along the border.
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bastioncitadelfortrampartbulwark
2.

the action of fortifying or strengthening something

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The fortification of the city walls was a priority.
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Dietary fortification with vitamins is common.
:
strengtheningreinforcementbuttressingshoring upbolstering