English

Definition of patio door noun from the Oxford Advanced Learner's Dictionary

 

patio door

 noun
noun
BrE BrE//ˌpætiəʊ ˈdɔː(r)//
 
; NAmE NAmE//ˌpætioʊ ˈdɔːr//
 
[usually plural] (especially British English)
 
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a large glass sliding door that leads to a garden or balcony
See the Oxford Advanced American Dictionary entry: patio door