WordWeb Online

1. Cause to start burning
   "The setting sun conflagrated the sky with oranges and reds";
   - kindle, enkindle [literary], inflame
    
2. Start to burn or burst into flames
   "Marsh gases conflagrated suddenly";
   - erupt, ignite, catch fire, take fire, combust

Derived forms: conflagrating, conflagrated, conflagrates

Type of: change state, ignite, light, turn

Encyclopedia: Conflagrate