/ ˈlɑːgə(r); NAmE / noun
( SAfrE ) (in the past) a group of wagons that were put into a circle in order to protect people in the middle :
They drew their wagons into a laager and set up camp.
a laager mentality (= one that is not willing to accept new ideas)
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WORD ORIGIN
South African Dutch , from Dutch leger , lager camp. Compare with lager and lair .