broad·en /ˈbrɔːdən/ vi. | vt. ❶ vi. 变宽，变阔；扩大 The river broadens at its mouth. 河口处河面变宽。 Her round face broadened out into a smile. 她的圆脸上绽开了笑容。 ❷ vt. 使宽，使阔；使扩大 They have broadened the road. 他们已加宽了路面。 His experiences have broadened his mind. 他的经历使他视界开阔。