combustion combustion /kəmˈbʌstʃən/

noun

1. () A process in which a substance reacts with oxygen to give heat and light  ( burning , combustion )
   a process in which a substance reacts with oxygen to give heat and light
     The rapid combustion of the fuel produced heat and light.
   The rapid combustion of the fuel produced heat and light.
   
   
2. The act of burning something  ( combustion , burning )
   the act of burning something
    The burning of leaves was prohibited by a town ordinance
   the burning of leaves was prohibited by a town ordinance
   
3. A state of violent disturbance and excitement  ( combustion )
   a state of violent disturbance and excitement
    Combustion grew until revolt was unavoidable
   combustion grew until revolt was unavoidable