Definition of knowledgeable adjective from the Oxford Advanced Learner's Dictionary

 

knowledgeable

 adjective
adjective
BrE BrE//ˈnɒlɪdʒəbl//
 
; NAmE NAmE//ˈnɑːlɪdʒəbl//
 
Job skills and personal qualities
 
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knowledgeable (about something) knowing a lot synonym well informed She is very knowledgeable about plants. See related entries: Job skills and personal qualitiesExtra examples He’s very knowledgeable about Latin American culture. Her lawyer seemed very knowledgeable and experienced. Bill was nice enough and seemed extremely knowledgeable too. She’s very knowledgeable about all kinds of music.
See the Oxford Advanced American Dictionary entry: knowledgeable