English

Definition of hourly adverb from the Oxford Advanced Learner's Dictionary

 

hourly

 adverb
adverb
BrE BrE//ˈaʊəli//
 
; NAmE NAmE//ˈaʊərli//
 
Use an, not a, before hourly.
 
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every hour Reapply sunscreen hourly and after swimming. Dressings are changed four hourly (= every four hours) to help prevent infection.
See the Oxford Advanced American Dictionary entry: hourly