fort 
/ˈfoɚt/ noun
plural forts /ˈfoɚt/ noun [count] : a strong building or group of buildings where soldiers live
▪ They captured the fort after a long battle.
▪ They captured the fort after a long battle.
hold the fort or US hold down the fort
: to be in charge of a place while the person who is usually in charge is away
▪ You can stay here and hold the fort while I go to the store.
▪ You can stay here and hold the fort while I go to the store.
