American English

Definition of outermost adjective from the Oxford Advanced American Dictionary

 

outermost

 adjective
adjective
NAmE//ˈaʊt̮ərˌmoʊst//
 
[only before noun]
 
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furthest from the inside or center the outermost planet He fired and hit the outermost ring of the target. opposite innermost
See the Oxford Advanced Learner's Dictionary entry: outermost