to ‧ pi ‧ a ‧ ry /ˈtəʊpiəri $ ˈtoʊpieri/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Latin ; Origin: topiarius 'of decorative gardening' , from topia 'decorative gardening' , from Greek topos 'place' ]
trees and bushes cut into the shapes of birds, animals etc, or the art of cutting them in this way