1823 Mar. 132/2 The general duty of seriousmindedness I leave to be urged by others.
1960 N. Pevsner (rev. ed.) iv. 94 The seriousmindedness of the Pre-Raphaelites, Morris, and the Arts and Crafts.
2002 30 214 The Quakerish dress of Victorian heroines..signifies..neatness, serious-mindedness, and modesty.