Definition of pillbox noun from the Oxford Advanced Learner's Dictionary

 

pillbox

 noun
noun
BrE BrE//ˈpɪlbɒks//
 
; NAmE NAmE//ˈpɪlbɑːks//
 
 
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a small shelter for soldiers, often partly underground, from which a gun can be fired
See the Oxford Advanced American Dictionary entry: pillbox