fort UK /fɔːt/US /fɔɹt/noun 4verb 1forms 3phrases 2 noun4 •a place with strong walls where soldiers stay to keep an area safe from attack •Any permanent army post. •A structure improvised from furniture, bedding, etc., for playing games.The kids built a fort out of chairs and pillows. •(historical) An outlying trading-station, as in British North America. verb1 •To create a fort, fortifications, a strong point, or a redoubt. formsforted · forting · forts Phrases with fort fort upTo fortify (a place); to convert into a fort. man the fortTo take care of a place or situation in another's absence.