WordWeb Online

1. Canvass by distributing letters
   - circularise [Brit]
    
2. Canvass by using a questionnaire
   - circularise [Brit]
    
3. Distribute circulars to
   - circularise [Brit]
    
4. Cause to become widely known
   "circularize a rumour";
   - circulate, circularise [Brit], distribute, disseminate, propagate, broadcast, spread, diffuse, disperse, pass around
    
5. Make circular
   - circularise [Brit]

Derived forms: circularizes, circularized, circularizing

Type of: air, alter, bare, canvass, change, modify, poll, publicise [Brit], publicize, send around