Definition of "magisterial"

The economist and demographer David Lam, in his magisterial 2011 presidential address to the Population Association of America, identified the keys to global prosperity in the face of record rates of population growth.

2013, Angus Deaton, The Great Escape: Health, Wealth, and the Origins of Inequality

Instead a ‘magisterial’ Reformation was created: these were the Protestant movements led by the magistri, the theologically educated masters, and magistrates of all descriptions – kings, princes, city councils.

2009, Diarmaid MacCulloch, A History of Christianity, Penguin, published 2010, page 622