unfundaˈmental,a. (un-1 7.) 1638Chillingworth Relig. Prot. i. ii. §155. 114 This assertion..is neither a Fundamentall nor Vnfundamentall point of Faith.a1711Ken HymnotheoPoet.Wks. 1721 III. 236 How tenderly God treats all Hearts sincere, Who tow'rds Mistakes unfundamental veer.