1. to make or become wider
2. to make or become more extensive in scope, range, or understanding

Examples

• The river broadens as it approaches the sea.
• The road broadens into a four-lane highway.
• Travel broadens one’s perspective on different cultures.
• Reading classic literature broadens your vocabulary.
• The investigation broadens to include new suspects.
• Her smile broadens when she sees her grandchildren.
• The valley broadens beyond the mountain pass.