From Longman Dictionary of Contemporary Englishemission crediteˈmission ˌcredit noun [countable usually plural] official permission to produce a particular amount of a substance that can harm the environment, which is given to a company by a government or organization or bought by a companyFrom Longman Business Dictionaryemission crediteˈmission ˌcredit [countable, uncountable]TAX another name for pollution credit → credit