Latitudinarianism \Lat`i*tu`di*na"ri*an*ism\, n. A latitudinarian system or condition; freedom of opinion in matters pertaining to religious belief. Fierce sectarianism bred fierce latitudinarianism. --De Quincey. He [Ammonius Saccas] plunged into the wildest latitudinarianism of opinion. --J. S. Harford.