v. [f. prec.: after lengthen.] intr. To increase in breadth; to broaden, widen.
1809. W. Taylor, in Robberds, Mem., II. 278. The inroads of mediocrity are ever breadthening.
1884. A. Forbes, in Eng. Illustr. Mag., April, 455/2. As I painted, the picture breadthened on the canvas.
