fortification

noun

for·​ti·​fi·​ca·​tion ˌfȯr-tə-fə-ˈkā-shən 

1

: an act or process of fortifying

2

: something that fortifies, defends, or strengthens

especially : works erected to defend a place or position

Did you know?

In the Middle Ages, many European cities were entirely enclosed by sturdy walls, with walkways along the top and towers at intervals, designed to make an invasion impossible. A water-filled ditch, or moat, might run alongside the wall for added defense. Such defenses turned the entire city into a fort, or fortress. Over the centuries, fortifications changed steadily with the development of new weaponry. In World War II, the German fortification of the French coast included antitank barriers, bunkers, minefields, and underwater obstacles, but it wasn't enough to turn back the immense force of the Allied invasion on D-day.

Synonyms of fortification

• fortress
• stronghold
• citadel
• bastion
• castle
• fort

Examples of fortification in a Sentence

They began the fortification and reconstruction of the city.

defenders at the border fortifications preparing for an attack

Recent Examples on the Web

With the growing threat has come greater fortification—so much so that the White House complex can be thought of as the new Green Zone. —Matt Viser, The Atlantic, 1 June 2026

Built as a Crusader castle around the 12th century on top of previous fortifications, it has also been used by Saladin’s Jerusalem army, Mamluks, Ottomans, the French and the Palestine Liberation Organization. —Arkansas Online, 31 May 2026

French doors open to balconies with views across Chania toward the sea, and the citrus- and olive-filled garden is bound, in part, by the city’s ancient Venetian fortifications. —Katie Silcox, Vogue, 28 May 2026

Cahir Castle Dating from the 13th century, Cahir Castle is one of Ireland’s largest and best-preserved fortifications. —Patricia Doherty, Travel + Leisure, 22 May 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for fortification

• abbreviation
• abomination
• acceleration
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration

Kids Definition

fortification

noun

for·​ti·​fi·​ca·​tion ˌfȯrt-ə-fə-ˈkā-shən 

1

: the act of fortifying

2

: a construction built for defense