JuneauPronunciation: /ˈdʒuːnəʊ/Definition of Juneau the state capital of Alaska, a seaport on an inlet of the Pacific Ocean in the south of the state; population 30,988 (est. 2008). Origin:named after Joseph Juneau, who discovered gold there in 1880Juneau in other Oxford dictionaries Definition of Juneau in the US English dictionary