a ‧ quar ‧ i ‧ um /əˈkweəriəm $ əˈkwer-/ BrE AmE noun ( plural aquariums or aquaria /-riə/) [countable]
[ Date: 1800-1900 ; Language: Latin ; Origin: aquarius 'of water' , from aqua ; ⇨ ↑ aquatic ]
1 . a clear glass or plastic container for fish and other water animals
2 . a building where people go to look at fish and other water animals