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English definition of “emission”

emission

noun     /ɪˈmɪʃ.ən/
C1 [U] the act of sending out gas, heat, light, etc.: Environmental groups want a substantial reduction in the emission of greenhouse gases.Environmental issuesRubbish and wasteProtection and protectorsEmitting and ejecting C1 [C] an amount of gas, heat, light, etc. that is sent out: carbon dioxide emissionsEnvironmental issuesRubbish and wasteProtection and protectorsEmitting and ejecting
(Definition of emission noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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