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

Iran’s neighbors, particularly Turkey and Iraq, are preparing contingency plans including border fortifications and refugee shelters amid fears of a potential crisis. —Sam McNeil, Los Angeles Times, 15 Mar. 2026

Over the past few years, researchers have mapped the city's fortification walls, street grids and city blocks, thanks to drone imagery and high-resolution geophysical scans. —Andrea Margolis, FOXNews.com, 13 Mar. 2026

Even though the border was relatively quiet for years, Israel also prepared for the next war with Hezbollah, gathering intelligence and building its own fortifications. —Oren Liebermann, CNN Money, 6 Mar. 2026

While fortified nutritional yeast provides B12 and is a good addition to a vegetarian diet, fortification levels vary widely across brands. —Stephanie Brown, Verywell Health, 4 Mar. 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