WordWeb Online

1. Become broader, wider or more extensive
   "The road widened"
    
2. Make (clothes) larger
   "widen that dress--I gained a lot of weight";
   - let out
    
3. Make wider
   "widen the road"
    
4. Increase in scope, range or area
   "widen the range of applications";
   - broaden, extend

Derived forms: widened, widening, widens

Type of: alter, change, increase, modify, vary

Antonym: contract

Encyclopedia: Widen, West Virginia