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1. The act of making something wider
   - widening
    
2. The action of making broader
   "the broadening of travel"
    
3. An increase in width
   - widening

1. Make broader
   "broaden the road"
    
2. Increase in scope, range or area
   "broaden your horizon";
   - widen, extend
    
3. Vary in order to spread risk or to expand
   "The company broadened";
   - diversify, branch out
    
4. Become broader
   "The road broadened"

Derived forms: broadenings

Type of: alter, change, change of shape, development, growth, increase, increment, vary

Antonym: narrow down

Encyclopedia: Broadening