Definition of "uncanonical"

What I said in my epistle to my reverend friend and master, Doctor James, the incomparably industrious and learned bibliothecary of Oxford, I profess still; but I hold those canons of the apostles uncanonical.

1620, Joseph Hall, The Honour of the Married Clergy

He was also that rare thing, a connoisseur of the uncanonical hybrid in art, as demonstrated by the presence of a headdress mask of a water spirit from Sierra Leone.

2007 January 10, Holland Cotter, “At Yale, Renovation Puts Africa in Spotlight”, in New York Times‎