A fortification is a strong wall, building, or other reinforced structure that's used to defend against attack. In medieval times, castle fortifications protected them from invading armies.

If you've ever built a fort in your living room or back yard, you know what a fortification is—fort is the shortened form, and the source word is the Latin fortificare, "make strong." Another meaning of fortification is "the act of making something (or someone) stronger," so you might talk about the fortification your math team got from taking an online calculus class or the fortification of your favorite breakfast cereal with vitamins.

Definitions of fortification

n defensive structure consisting of walls or mounds built around a stronghold to strengthen it

Maginot Line
a fortification built before World War II to protect France's eastern border; initially considered to be impregnable, it was easily overrun by the German army in 1940
Siegfried line
German fortifications facing the Maginot Line
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projecting part of a rampart or other fortification
bunker, dugout
a fortification of earth; mostly or entirely below ground
a large building formerly occupied by a ruler and fortified against attack
the arrangement of defensive fortifications to protect against enemy fire
entrenchment, intrenchment
an entrenched fortification; a position protected by trenches
escarp, escarpment, protective embankment, scarp
a steep artificial slope in front of a fortification
a temporary fortification built by troops in the field
temporary fortification like a detached bastion
fortification consisting of a strong fence made of stakes driven into the ground
breastwork, parapet
fortification consisting of a low wall
(military) a temporary or supplementary fortification; typically square or polygonal without flanking defenses
fortification consisting of a fence made of a line of stout posts set firmly for defense
fox hole, foxhole
a small dugout with a pit for individual shelter against enemy fire
funk hole
dugout as a place of safe retreat (when in a funk)
a projecting parapet supported by corbels on a medieval castle; has openings through which stones or boiling water could be dropped on an enemy
entrenchment consisting of an additional interior fortification to prolong the defense
Type of:
defence, defense, defensive structure
a structure used to defend against attack

n the art or science of strengthening defenses

Type of:
art, artistry, prowess
a superior skill that you can learn by study and practice and observation

n the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food)

Type of:
act of making fuller or more meaningful or rewarding

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