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Related to broaden: broaden your horizons
broaden (one's) horizons
To have a new experience. I'm really nervous to live at school, but I know I need to broaden my horizons and get some experience living without my family. I can't believe that Molly has never left the state before! She seriously needs to broaden her horizons!
To widen or expand something. A noun can be used between "broaden" and "out" or after "out." They want to knock down a wall and broaden their kitchen out. I'm doing these exercises to broaden out my shoulders.
to become wider; to expand. The river broadened out and became deeper. The road broadens out here.
broaden something out
to make something wider; to expand something. Now, broaden this part out a little, so it looks like a cloud, not a painted pillow. Broaden out the river in your painting so it looks very wide. The photographic view of the valley can be broadened out by using a different lens.
Travel broadens the mind.
Prov. When you travel, you learn things about the people and places you see. Marie: I never realized how well-off most Americans are until I visited India. Jane: So it's true that travel broadens the mind, huh? Everyone who gets the chance should go abroad. Travel broadens the mind.