Definition of keen-eyed in English. Meaning of keen-eyed in English. Example of keen-eyed. Synonyms of keen-eyed. Spelling of keen-eyed. How to pronounce keen-eyed. keen-eyed means: 1. having keen eyesight. #dictionary #dictionaryvideos #keen-eyed #english #englishgrammar #learn #learning #englishlearning #education #vocabulary #spokenenglish