SeanadPronunciation: /ˈʃanəð, -d, ˈsʲanəd/ (also Seanad Éireann /ˈɛːrən, ˈeːrʲən/)Definition of Seanad the upper house of Parliament in the Republic of Ireland, composed of sixty members, of whom eleven are nominated by the Taoiseach and forty-nine are elected by institutions. Origin:Irish, 'senate (of Ireland)'Seanad in other Oxford dictionaries Definition of Seanad in the US English dictionary