What does defiladed mean?
"Defiladed" is the past tense of "defilade," a specialized military term meaning shielded from enemy fire — particularly horizontal, flat-trajectory fire — by a natural feature of the ground. A unit that is defiladed occupies a position where a slope, embankment, ravine, or reverse side of a hill blocks the enemy's line of sight and line of fire, offering protection without necessarily concealing it from overhead observation. The word comes from French fortification vocabulary, ultimately derived from "file," meaning a row or line, so something defiladed is literally kept out of the enemy's firing line. It appears almost exclusively in field manuals, military history, and tactical writing, alongside its counterpart "enfiladed," which describes positions caught broadside in an enemy's line of fire.
verb (past tense and past participle of defilade)Shielded or protected from enemy fire, especially horizontal fire, by means of natural terrain features such as a slope, bank, or ridge; arranged so as to be out of the line of direct fire.
- (Of troops, vehicles, or installations) protected from hostile observation or direct fire, especially horizontal fire, by a terrain feature such as a reverse slope, embankment, or ravine.
"The artillery battery was defiladed behind a low hill, invisible to the enemy's forward observers."
"The machine-gun nest was defiladed in a shallow gully, safe from flat-trajectory rifle fire."
"Engineers chose a defiladed route along the riverbank to keep the convoy out of sight."
Soldiers don't just hide — when a hill does the hiding for them, they're 'defiladed,' a word borrowed straight from French fortification manuals.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of defiladed
"Defilade" derives from French "défiler," meaning to march past or to file off, formed from "dé-" plus "file" (a line or row), from Latin "filum" (thread). Adopted into English military usage in the 18th–19th centuries amid the era's heavy borrowing of French fortification terminology, it originally described keeping troops or works out of the line of an enemy's fire. Its antonymic partner "enfilade," from the same French root, describes raking a position along its length with fire.
Related word forms
How defiladed is actually used
Strictly a military term, used almost exclusively in formal, technical, and historical contexts — field manuals, war histories, and tactical writing. It is rarely encountered outside discussions of fortification, gunnery, and terrain tactics.
Easily confused with defiladed
Defaulted means failed to fulfill an obligation (as on a loan); defiladed means shielded from enemy fire by terrain.