Definition of "topiarian"

the topiarian artist

1816, [Walter Scott], The Antiquary. […], volumes (please specify |volume=I to III), Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co.; London: Longman, Hurst, Rees, Orme, and Brown

[T]he southern court of the ballium had become a flower-garden, with quaint terraces, statues, knots of flowers, clipped yews and hollies, and all the pedantries of the topiarian art.

1855, Charles Kingsley, “The True and Tragical History of Mr. John Oxenham of Plymouth”, in Westward Ho!: Or, The Voyages and Adventures of Sir Amyas Leigh, Knight, […], volume I, Cambridge, Cambridgeshire: Macmillan & Co., page 209