reduction reduction /rɪˈdʌkʃən/

noun

1. () The act of decreasing or reducing something  ( decrease , diminution , step-down , reduction )
   the act of decreasing or reducing something
     The government implemented measures for the reduction of carbon emissions.
   The government implemented measures for the reduction of carbon emissions.
   
2. () Any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent  ( reducing , reduction )
   any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent
     The reducing agent helped convert the metal ions into their elemental form.
   The reducing agent helped convert the metal ions into their elemental form.
   
3. () The act of reducing complexity  ( simplification , reduction )
   the act of reducing complexity