From Longman Dictionary of Contemporary Englishabove boardaˌbove ˈboard / $ .ˈ../ adjective [not before noun] LEGALhonest and legal His plans for opening a coffee shop are completely above board.From Longman Business Dictionaryabove boardaˈbove ˌboard (also aboveboard American English) adjectiveCOMMERCE honest and legalThe stock exchange aims to ensure that all deals are above board.aboveboard negotiations
