Fort (?), n. [F., from fort strong, L. fortis; perh. akin to Skr. darh to fix, make firm, and to E. firm Cf. Forte, Force, Fortalice, Comfort, Effort.] Mil.
A strong or fortified place; usually, a small fortified place, occupied only by troops, surrounded with a ditch, rampart, and parapet, or with palisades, stockades, or other means of defense; a fortification.
Detached works, depending solely on their own strength, belong to the class of works termed forts.
© Webster 1913.