top-ranking
adjective/ˌtɒp ˈræŋkɪŋ/
/ˌtɑːp ˈræŋkɪŋ/
[only before noun]- of the highest rank, status or importance in an organization, a sport, etc.
- top-ranking officials
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top-ranking
Definition of top-ranking adjective from the Oxford Advanced Learner's Dictionary