broad·en/`brɔdṇ; ˈbrɔːdn/ v [I,T] 1 to include or make something include more different kinds of things or people （使）扩大: training designed to broaden your knowledge of practical medicine 为增进你的临床医学知识而设的训练 2 also 又作 broaden out to make something wider, or to become wider （使）变宽，（使）变阔: The river broadens out here. 这条河在此处开始变得宽阔。