widen in WordNet English dictionary

1. extend in scope or range or area
   "The law was extended to all citizens"; "widen the range of applications"; "broaden your horizon"; "Extend your backyard"
   widen  broaden  extend 
   
2. make (clothes) larger
   "Let out that dress--I gained a lot of weight"
   let out  widen 
   
3. become broader or wider or more extensive
   "The road widened"
   widen 
   
4. make wider
   "widen the road"
   widen