(intransitive, archaic) To march in a single file or line; to file. / (transitive, obsolete) To march across (a place) in files or lines.

A narrow passage or way (originally (military), one which soldiers could only march through in a single file or line), especially a narrow gorge or pass between mountains.

(transitive, military, rare) Synonym of defilade (“to fortify (something) as a protection from enfilading fire”)

(military, rare) An act of defilading a fortress or other place, or of raising the exterior works in order to protect the interior.

(semantics) A definition relying directly or indirectly on the term being defined.

damaging to someone's reputation, especially if untrue

(finance) A put option that makes a payoff in the event the issuer of a specified reference asset defaults.

Someone who defends people or property. / (sports) One of the players whose primary task is to prevent the opposition from scoring. / A fighter who seeks to repel an attack.

(transitive) To make (something) deviate from its original path.

The act of deflecting or something deflected. / The deviation of a needle or other indicator from its previous position.