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

 

buttress

 noun
noun
BrE BrE//ˈbʌtrəs//
 
; NAmE NAmE//ˈbʌtrəs//
 
Structures
 
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a stone or brick structure that supports a wall It was necessary to strengthen the building with large external buttresses. See related entries: Structures Word Origin Middle English: from Old French (ars) bouterez ‘thrusting (arch)’, from boter ‘to strike or thrust’, of Germanic origin.
See the Oxford Advanced American Dictionary entry: buttress

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