1. The action of making broader
   "the broadening of travel"
    
2. The act of making something wider
   "The broadening of the road reduced traffic congestion";
   - widening
    
3. An increase in width
   "The broadening of the river made it difficult to cross";
   - widening

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

Derived forms: broadenings

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

Antonym: narrow down, narrowing

Encyclopedia: Broadening