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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 or pronoun can be used between "broaden" and "out." They want to knock down a wall and broaden their kitchen out. I'm doing these exercises to broaden out my shoulders.
travel broadens the mind
proverb One gains greater perspective on and knowledge about the world, other people, and oneself when one travels to different places. A: "I was thinking about taking a year off of work and traveling around Europe." B: "I think that sounds great. Travel broadens the mind, after all." A: "Why is Uncle Jamie so narrow-minded?" B: "Well, part of the reason is that travel broadens the mind, and he's never stepped foot outside of this town."
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.