Meaning of “emission” - Learner’s Dictionary

emission

noun [ C, U ] uk us /ɪˈmɪʃən/

the act of sending gas, heat, light, etc. out into the air, or an amount of gas, heat, light, etc that is sent out:

Carbon dioxide emissions will be reduced by 20%.

(Definition of “emission” from the Cambridge Learner’s Dictionary © Cambridge University Press)