topiary
US /ˈtoʊ.pi.er/
UK /ˈtoʊ.pi.er/

1.
the art or practice of clipping shrubs or trees into ornamental shapes
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The garden featured elaborate topiary designs.
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Learning topiary requires patience and precision.
2.
a plant that has been clipped or trained into an ornamental shape
:
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The garden was filled with various animal-shaped topiaries.
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A spiral-shaped topiary stood proudly at the entrance.