English

Definition of all-day adjective from the Oxford Advanced Learner's Dictionary

 

all-day

 adjective
adjective
BrE BrE//ˈɔːl deɪ//
 
; NAmE NAmE//ˈɔːl deɪ//
 
[only before noun]
 
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continuing or available for the whole day an all-day meeting The cafe serves an all-day breakfast.
See the Oxford Advanced American Dictionary entry: all-day