† proˈfundeurObs.rare—1. [ad. F. profondeur, f.profond profound: cf.grandeur.] Depth, profundity. 1658Sir T. Browne Gard. Cyrus iv. 162 They strictly make good their profundeur or depth.1661Blount Glossogr. (ed. 2), Profundeur,..profundity, depth, deepness.