Lewis Short
ostentātor (noun M) : ostento
* A vain, self-satisfied exhibiter, a displayer, parader, boaster, vaunter: ostentatores meri,Plaut. Curc. 4, 1, 15: ostentatorem pecuniae gloriosum describere,Auct. Her. 4, 50, 63: factorum,Liv. 1, 10: omnium, quae diceret,Tac. H. 2, 80: rector juveni et ceteris periculorum praemiorumque ostentator,id. A. 1, 24.
Charlton T. Lewis, Charles Short, A Latin Dictionary