(adj) referring to or relating to or having the style of architecture created by Andrea Palladio, Example:the much imitated arch and column compositions known as the Palladian motif
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
prop. a. (Arch.) Of, pertaining to, or designating, a variety of the revived classic style of architecture, founded on the works of Andrea Palladio, an Italian architect of the 16th century; as, a Palladian window. [ 1913 Webster ]