English Lexicon

Emission

/ɪˈmɪʃ.ən/
nounCEFR B2 (Upper)Top #2150 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The act of sending out or releasing something, particularly gases or substances.

    "The emission of greenhouse gases is a significant contributor to climate change."
  2. 2

    A substance that is emitted, especially in the context of pollutants or gases.

    "The factory's emissions exceeded the legal limits set by environmental regulations."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Latin 'emissionem', meaning 'a sending out', from 'emittere' (ex- 'out' + mittere 'to send'). It entered the English language in the 17th century, initially used in physics and optics regarding the sending forth of light or rays, later expanding to include gases, pollutants, and radiation.

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