一いっ級きゅうConjugationsTop 8000MeaningsNa-adjectiveNoun1. one grade; first-class; primaryKanji used一one級classPitch accentいっきゅうUsed in vocabulary一いっ級きゅう品ひんfirst-class goods; A-grade productNoun一いっ級きゅう河か川せんclass A river; specified waterways of special importance protected by the governmentNoun一いっ級きゅう建けん築ちく士しregistered architect with a first-class licenseNoun