Tasmania /tæzˈmeɪniə/ noun2 •One of the six federal states of Australia, consisting of one large, eponymous and several much smaller islands, off the eastern part of Australia's south coast; a former British colony, from 1856 to 1901. Capital: Hobart.Osteoporosis Australia is calling for the 'no hat, no play' policy in school playgrounds to be reassessed in the ACT and Tasmania, because children are not getting enough sunlight. — 2006 •The large island of Australia comprising the majority of the state of Tasmania's land area and on which most of its inhabitants live.